Let's enjoy 'Think & Try' !
(for Children and Highschool students)
Editor: Toru Nakagawa
Last updated: Jun. 26, 2015

For solving problems creatively
(for Students and the General public)
  Social Problems
Editor: Toru Nakagawa
Last updated: Aug. 14, 2018

Methods of creative problem solving
(for Engineers and Researchers novice to TRIZ)
Editor: Toru Nakagawa
Last updated: Aug. 14, 2018

Practices and methodologies of Creative problem solving
(for Practitioners and Experts)
Editor: Toru Nakagawa
Last updated: Aug. 14, 2018

TRIZ HomePage in Japan  Logo
This home page serves as an open forum of information exchange for better understanding and usage of Creative Problem Solving Methodologies, especially based in Japan.  Readers' contributions are very welcome, including introductory articles, papers, case studies, news, questions, comments, etc
Pages under this directory are the English versions. 
Click the hyper-linked keywords or the  buttons.
The  buttons guide you to the Japanese pages.
Most articles are posted in the two languages, but some are only in either of them.  

Last Updated:  October 19, 2018  
Editor:  Toru Nakagawa 
(Professor Emeritus, Osaka Gakuin Univ.)
Last Updated:
  October 19, 2018

Established on Nov. 1, 1998

visits since Nov. 1, 2005

Four Entrance Pages have been introduced.  You may be guided through them to readable/useful articles depending on your situations and interests.   Free xml sitemap generator

New Information (for the latest 9 months) are shown below in the present page.  Articles are marked in 5 different colors:   ( old or not classified).  (Oct. 17, 2014)

Let's enjoy 'Think & Try' !

(for Children and Highschool students)

(1) Everything is interesting!
(2) Watch and find it!
(3) Think 'Why?'.
(4) Learn how it works.
(5) Understand the function.
(6) Think for yourself.
(7) Imagine the ideal.
(8) Collect different examples.
(9) Try to devise something new!
(10) Information for teachers and parents

For solving problems creatively

(for Students and the General public)

(1) Necessity and importance of addressing problems
(2) Creativity and enlightenment
(3) Different methods of creative problem solving
(4) Understanding the problems and needs
(5) Analyzing the problem and imagining the ideal
(6) Generating solution ideas and trying to implement them
(7) Case studies in various fields
(8) Addressing to familiar problems and problems in society
  Social Problems
(9) Information sources and learning opportunities
(10) Miscellaneous

Methods of creative problem solving

(for Engineers and Researchers novice to TRIZ)

(1) Purposes and significance of 'Creative problem solving'
(2) What is TRIZ
(3) Information sources of TRIZ
(4) History and current situations of TRIZ
(5) Basics of TRIZ
(6) Knowledge bases and tools of TRIZ
(7) Methodologies of TRIZ and its extensions
(8) Application case studies
(9) Mastering and practicing TRIZ
(10) Questions and discussions

Practices and methodologies of Creative problem solving

(for Practitioners and Experts)

(1) Full use of the present site (New information, General index, Searching, etc.)
(2) TRIZ references, links, and software tools
(3) TRIZ news, activities, and conference reports

(4) TRIZ papers and articles

(5) TRIZ case studies of application and promotion
(6) TRIZ lecture notes and course materials
(7) Documents of TRIZ/CrePS methodologies
(8) TRIZ Forum (communications, discussions, questions, etc.)


General Index  (A) Editorial (B) References Links News & activities Software tools (C) Papers, case studies, articles, Lectures, course materials   (D) Forum General Index 
Home Page New Information for children and highschool students for students and the general public for engineers (introduction) for Practitioners CrePS System Documents USIT Manual & Case Studies WTSP (World TRIZ Sites Project) Search in this site Home Page


New Information    [Articles posted/updated within these 12 months.  marks within these 3 months.

  TRIZ Forum:  Letters from Readers (Sept. - Oct. 2018)   (Oct. 19, 2018). Index of Letters from Readers   (Oct. 19, 2018)

[English page   ]  Toru Nakagawa; Robert Adunka (Germany), Bohuslav Busov (Czech Republic), Shireen Al-Jaouni (Palestine), Anatoly Guin (Russia), Nikolay Shpakovsky (Russia), and Elena Guin (Russia)
Update Announcements of this home page contain mainly Collection of T. Takahara's Papers (2016-2018), WTSP paper presented at Japan TRIZ Symposium, and results of Preliminary Internet Searches in individual (33+) countries.  Since late September, TRIZ leaders in Germany, Czech, Russia, etc. responded to me to make some trials of surveying TRIZ related Web sites in their countries.  WTSP seems to be starting its activities slowly.

[Japanese page ] Toru Nakagawa; Katsushige Hino, Toshio Takahara
The 4th Collection of Toshio Takahara's Papers (2016-2018), containig 11 papers, is the important articles in Japanese during this period.  Takahara's Research Note 2018 has over 80 A4 pages and is posted in 4 parts.  Hino comments on Takahara and results in a nic discussion.

  Forum: Visiting Mr. Yasuyuki Takaguchi, ex-Chief Priest, of Isshinji Temple in Osaka  (Oct. 19, 2018)

On Sept. 9 and 10, I visited Mr. Yasuyuki Takaguchi, ex-Chief Priest, of Isshinji Temple in Osaka.  He is one of my best friends studying together at Koyo Gakuin, Junior and Senior High School, in Nishinomiya City, Hyogo Prefecture, playing (soft) tennis in a pair.  He studied Architecture at Kyoto University, and later happened to become Chief Priest of Isshinji Temple (Jodo Shu in Budhism), and worked as Professor at Nara Women University and operated an office as the owner Architect, all at the same time.

Since he and I were working in different fields and living in different areas in Japan, we did not have so much chances of talking deeply even though we knew the hard working of each other.  In the visit this time, I re-recognized his personality and great achievements. So I asked him to contribute a series of articles on his thoughts, activities, and achievements, to TRIZ Home Page in Japan. 

Please take a look at the photo attached here. It shows the inside of a hall 'Sanzen-Butsu-Do', designed and built by Rev. Takaguchi in 2002.  He writes: "This Hall is built just outside of the traditional Isshinji square, facing to a public street and is open everyday from 9:00 to 16:00 for everybody freely, symbolizing an Open Temple. You may encounter with (or be embraced by) Amida Butsu (in the center) and Kannon Bosatsu and Seshi Bosatsu, who have come to save you over the peaks of Himalayas.  I wanted to build a Budhist Hall with a brilliant chancel and with sky lights coming down through a high ceiling window.  For designing such a Hall, I visited Budhist halls in India, Islamic halls in Turkey, and Byzantine style Christian church in Venice, etc. and extracted the atmosphere common to them."  When I stepped in, I gasped in wonder, and while sitting quietly alone, I felt myself being purified. 


'Sanzen-Butsu-Do' Hall at Isshinji
by Rev. Takaguchi
Click the photo to enlarge

  TRIZ Forum:  Letters from Readers (Jun. - Aug. 2018)   (Oct. 19, 2018). Index of Letters from Readers   (Oct. 19, 2018)

[English page   ]  Toru Nakagawa
The Update Announcements of this home page are recorded. During this period, appeals for working together in the WTSP project are main activities.  Emails were sent to many TRIZ leaders in various countires, and responses were received. But they are not disclosed here.  Nakagawa posted his papers on the "Principal Contradiction of Human Culture: 'Liberty vs Love' Contradiction and Ethics" presented at (2C) ETRIA TFC2107, (2D) TRIZ Home Page in Japan, and (3A) ICCI2018. 

[Japanese page ] Toru Nakagawa; Tomomi Murata, Yasumasa Ikezoe, Tadasuke Mizutani
The Update Announcements are recorded here in Japanese. T. Murata sent me several photos of traditional fireworks (of 16th century) performed at Yoshida Shrine in Toyohashi City. Y. Ikezoe and T. Mizutani commented on my works of Principal Contradiciton.

traditional firework in Toyohashi
Photo by T. Murata, Jul. 20, 2018
Click the photo to enlarge

  WTSP Working Material: "Preliminary Internet Searches of TRIZ-related Sites in Various Countries (Toru Nakagawa) (Sept. 21; Sept. 25, 2018)

Preliminary Internet searches of TRIZ-related sites in various countries have been carried out.  On the basis of experiences in Japan, the search engine Yahoo!.Japan is used with the option of showing only one representative page for a site and a command URL for the internal search of the site.  Specifying the location country and appropriate languages, preliminary Internet searches were carried out for the countries UK, France, Italy, Germany, Russia, Korea, Australia, and USA.  The search results are docummented in MS Word and posted openly.  The search will be extended on request.

Searches are extended further for the countries: Spain, Portugal, Poland, Turkey, Iran, China, Taiwan, Thailand, Indonesia, and groups of countries speaking Spanish, Portugues, Arabic, etc. (TN, Sept. 25, 2018)

Searches are extended further for the countries: Spain, Belgium, Netherlands, Austria, Switzerland, Czechoslovakia, Denmark, Norway, Sweden, Finland, Canada, Argentina, and Brazil.  Thus the searches effectively cover 33+ countries individually.  See the table  of the .doc files of the searches. (TN, Sept. 27, 2018)

   TRIZ Promotion: WTSP Paper: "World TRIZ Sites Project (WTSP) for Building and Maintaining Catalogs of Global TRIZ Resources (Toru Nakagawa (Japan), Darrell Mann (UK), Michael Orloff (Germany), Simon Dewulf (Australia), Simon Litvin (USA), Valeri Souchkov (Netherlands)) (Sept. 21, 2018)

Presented at Japan TRIZ Symposium 2018, on Sept. 13-14, 2018 at Nakano Sun Plaza, Tokyo.  Slides PDF
Outline:  Introduction and background, Proposal of WTSP, Building Japan WTSP Catalog, Current state and difficulties in WTSP, Findings with Japan WTSP Catalog.  Message is: "Many Wonderful TRIZ-related Web Sites - we already have in Japan ! Why don't you take a look and utilize the WTSP Catalog of TRIZ-related Sites in Japan  .  Let's work Together ! Connected !! We will be able to learn much more soon with the WTSP Catalogs of TRIZ-related Sites in the World !!!"

  Basic Theory: "A Working Research Note on Philosophy (2018): A Note on the Principle of Way of Life of Homo Sapiens Based on Contradiction Model and Radical Enumerable Thinking " (Toshio Takahara) (Aug. 30; Sept. 1; Oct. 10, 2018)

Contributed to TRIZ Home Page in Japan on Apr. 12, 2018; Revised on Jun. 13, 2018; Posted on Aug. 30, 2018.  Further revised on Sept. 16, 2018 and Posted on Oct. 10, 2018.
This is an up-to-date working research note written by Toshio Takahara in Japanese for the purpose of describing his system of theories as closely as possible.  Because of its big volume (over 80 pages), it is published here in four parts besides a top page.  Abstract written by the author in English (in 5 pages) is posted in HTML  and in PDF
Concept of Radical Enumerable Thinking (RET) and Contradictions (especially the Contradiction of Unity) are his main methods for investigation.  His up-to-date understanding (in Mar. 2018) of these concepts are described in Part 1 and Part 2.  Then in Part 3 he writes, Objectization (= analysis, seeing objectively, individualization, liberty, criticism, etc.) and Unification (= synthesis, taking subjectively, integration, love, modesty, etc.) should be used repeatedly, hierarchically, with nesting, etc. for the purpose of Resolution of Differences (i.e., problem solving, task achieving, etc.).  And it forms the basis of our ways of living, he says.  He also writes often about the importance of understanding the overview of human history (and its significance), such as the significance of the beginning of barter, and of agricultural revolution and industrial revolution as energy revolutions.  In its Part 4, he writes a preparatory discussion on post-capitalism.  The author describes his various insights clearly.

  Top page (Abstract, Table of Contents, Conclcusion, References) (Aug. 30; Oct. 10, 2018)

  Part 1. Radical Enumerable Thinking (Mar. 2018)  (Aug. 30; Oct. 10, 2018)

  Part 2. Contradiction Model (Mar. 2018) (Aug. 30; Oct. 10, 2018)

  Part 3. World View and Value Generating Sense of Object (Liberty) and Sense of Unity (Modesty and Love)   (Aug. 30, 2018)

  Part 4. On Artificial Intelligence, Logics in the Universe, Unified Theory of Humans, and Preparation for Post-Capitalism   (Aug. 30; Oct. 10, 2018)

  Basic Theory: "World View, Attitude and Logic of Life to Survive in the Universe " (Toshio Takahara) (Aug. 30; Oct. 10, 2018)

Presented at FIT 2017. On posting the 4th Collection of Papers written by Toshio Takahara (2016 - 2018), I feel it necessary to post this paper and its presentation slides in English, because his voluminous works are mostly written in Japanese only.  The phrase 'to survive in the universe' is somewhat peculiar, but it intends to eliminate various factors 'happened to be specific to the human kind on the Earth' and to extract really essencial factors in the desirable ways of living and ways of thinking for humans, I suppose.

  Basic Theory: ‘The Fourth Collection of Papers Written by Toshio Takahara (2016 - 2018) : "Theory of Resolving Differences (4) Radical Enumerable Thinking and Contradiction Model for the Way of Life" (Aug. 30; Oct. 10, 2018)

"TRIZ Home Page in Japan" has been publishing all the papers presented by Toshio Takahara since 2003, resulting 47 papers in total for these 15 years.  This 4th Collection covers all the 11 papers published by the author from 2016 to 2018 in relation to TRIZ in a wider sense.  Most of them are written in Japanese and some in English.  All the documents are posted here in PDF with links, and some of them are posted in HTML pages as well.   The author is trying to think over everything radically, generally, and systematically for building his original system of theories.  Thus he defines/re-defines various concepts and terms, which make his theory not easy to understand for readers at first.  For getting introduced, you may read the introductions (or Editor's note by Nakagawa) to the the Collection (1)(2003-2007) , Collection (2)(2008-2012) , and Collection (3)(2013-2015) of Takahara's Papers. 

In English pages, the paper presented at FIT2016 was published in Nov. 2016, and another presented at FIT2017 is now posted separately. The most important document in the 4th Collection is the Working Research Note (2018) posted now in 4 parts in Japanese , and its abstract written by the author is posted in English .   

 Forum: Sofware: Fuda-Memo is Open for Public Use: A Simplififed Fuda-Yose Software without using Excel (Akihiro Katahira ('Daiichi Kousha' ))  (Aug. 14, 2018)

The author is a unique thinker in creative problem solving (see (Jan. 18, 2015)) and the developer of Fuda-Yose Tool, which Nakagawa used much for Visual Thinking on social problems (see (Nov. 25, 2016)).  He has just developed Fuda-Memo software and introduces it in this home page.  It is another simple, nice, and useful software for Visual Thinking.  English version is not ready yet.

 TRIZ/CrePS Paper (Social problem): ‘Liberty vs Love’ and Ethics: Principal Contradiction of Human Culture and Solution Directions (Toru Nakagawa)   (Aug. 14, 2018)

Paper to be presented at ICCI2018 (International Conference on Creativity and Innovation) to be held by Japan Creativity Society on Sept. 10-12, 2018, Osaka.  Only Abstract is posted in English page (full paper will be after the Conference). 
The main purpose of this paper is (after describing the Basic Hypotheses) to discuss on 'Implications of the present Hypotheses in Comparison with the conventional/standard theories of Ethics and Philosophy'.  The discussion section has subsections: 7.1 What is the real root of the directions of Ethics ?; 7.2 Nature of Ethical Principles/Rules; 7.3 Comments on modern Ethics, especially on Utilitarianism; 7.4 Liberty vs Love Contradiction in place of Sidgwick’s Dualism of Practical Reasoning; 7.5 Discussion on Rawls’ “Principle of Justice”; 7.6 Liberty, Equity, and Fraternity; 7.7 Concepts of Good and Happiness in the Present Study.  Having studied several books in Ethics closely in Japanese, I now have confirmed my understanding that the Basic Hypotheses postulated in the present study are quite different from vaious preceeding works in reference and provide with new aspects and theory of significant importance.  In the Japanese page, Abstract, Discussions, and Conclusion are posted in Japanese translation

 WTSP Appeal:  An Appeal for Building Catalogs of TRIZ-related Sites in the World (WTSP Global Co-editors) (Jun. 25, 2018) 

WTSP Global Co-editors: Toru Nakagawa (Japan), Darrell Mann (UK), Michael Orloff (Germany), Simon Dewulf (Australia), Simon Litvin (USA), and Valeri Souchkov (Netherlands), Jun. 25, 2018

While the activities and accumulated knowledge of TRIZ and relavant methodologies become larger and larger, Internet search for them comes more difficult because of so much noise. In order to solve such a difficulty, we propose to build Catalogs of TRIZ-related Web Sites in the world. We had a prototype in 2008 and have recently demonstrated WTSP Catalog of TRIZ-related Sites in Japan . On the basis of these experiences, we are going to form a WTSP team in every country and build WTSP Catalog of each country and then of the World.  Why don't you join WTSP ? Could you please post this Appeal in your own Web site or forward it to your colleagues, as a sign of your support for the WTSP project?


 Appeal:  We need Your Help to build WTSP Catalog of TRIZ-related Sites in Your Country: Toru Nakagawa  (Aug. 22, 2018)

  TRIZ Forum:  Memorial of Mr. Masatoshi Hotta (Toru Nakagawa, Ellen Domb)   (Jun. 25, 2018; Latest update: Jun. 26, 2018)

Mr. Masatoshi Hotta, the former Managing Director of Japan TRIZ Society, has passed away on June 8, 2018.
In 1997, leading a department in Mitsubishi Research Institute (MRI), he started to introduce TRIZ into Japan in contract with Invention Machine Corp. He organized users group and users Consortium, and held study meetings every month and completed the Japanese Edition of IM TechOptimizer software, thus contributed much to the dissemination of TRIZ to industries in Japan. He was also involved actively in organizing and managing Japan TRIZ CB and NPO Japan TRIZ Society, serving as the Managing Director. At the end of 2012 he quitted his consulting firm SKI and resigned from management of JTS.  We remember him with his strengths in organization and practices and his warm heart of accepting people.  In memory of Mr. Masatoshi Hotta we have a memorial page here.  Please send us information of him and your messages for him. 

Messages received from: Ellen Domb (USA, the former Editor of the TRIZ Journal)

 TRIZ/CrePS Paper (Social problem): 'Liberty vs. Love': The Principal Contradiction of Human Culture (2) The 'Liberty vs. Love' Contradiction and 'Ethics' at the Personal Level (D) (Toru Nakagawa)   (Jun. 25, 2018) (Jun. 25; Aug. 14, 2018)

Extended paper in Japanese (D) published in "TRIZ Home Page in Japan", Jun. 25, 2018.
 I extended the paper (A) presented in the Proceedings of Japan Creativity Society Conf. 2017 by adding much discussions, and submitted it to the Journal of JCS on Sept. 15, 2017.  But I received a rejection reply on Jan. 10, 2018, mainly because of not enough reference to preceding works on Ethics.  I revised the paper further on Jan. 14 and Feb. 27, 2018, but the review process was not opened again. ---- Since presenting my basic hypotheses thoroughly is important at this stage, I think, I am publishing the Extended Paper (D) here in "TRIZ Home Page in Japan" in the Japanese page .  English translation is not ready, but the headings of the Discussion section are shown in the brief note in English . (Jun. 25, 2018)

Full paper in English translation has been posted, in HTML and in PDF (Aug. 14, 2018). Its Discussion section has following sub-sections: 6.1 Contributions of the Creative Problem Solving Methodology (TRIZ/CrePS); 6.2 Verifications of problem situations, relevant references, and hypothesis setting; 6.3 Structure and significance of the Basic Hypotheses; 6.4 Possibility of Common Basis of Ethics in Human Culture; 6.5 Significance and influences of the First Principle Liberty: Reformism and conservatism; 6.6 Significance, influences, and limitations of the Second Guiding Principle Love: Reformism and conservatism; 6.7 Social roles of the 0th Guiding Principle Ethics; 6.8 Factors which make the Principal Contradiction of Human Culture 'Liberty vs Love' even more difficult to solve.

 TRIZ/CrePS Paper (Social problem): 'Liberty vs. Love': The Principal Contradiction of Human Culture (2) The 'Liberty vs. Love' Contradiction and 'Ethics' at the Personal Level (C) (Toru Nakagawa)   (Jun. 25, 2018)

Presented at European TRIZ Association (ETRIA), TRIZ Future Conference (TFC) 2017, Oct. 4-6, 2017 at Lappeenranta (Finland).  The paper has been published officially by ETRIA as: Nakagawa, T., 'Liberty vs. Love': The Principal Contradiction of Human Culture (2) The 'Liberty vs. Love' Contradiction and 'Ethics' at the Personal Level.  Journal of the European TRIZ Association, INNOVATOR, ISSN 1866-4180, 02/2017 Volume 04, pp. 97-104 .  http://www.etria.eu/innovator/ETRIAjournal2017vol04.pdf  . In this HP, I am posting the paper in HTML  and in PDF and the presentation slides in HTML and in PDF .

In September and October last year, I presented papers with the same title at 3 conferences: (A) Japan Creativity Society Conference (Sept. 9-10), (B) Japan TRIZ Symposium (Sept. 21-22), and (C) ETRIA TFC2017 (Oct. 4-6).  Presentations (A) and (B) were already posted in the page   (Sept. 28, 2017), so I am posting this presentation (C) in the same page.  The full paper together with the presentation slides describe the Author's findings fully in English. 

  TRIZ Forum:  Letters from Readers (Jan. - May 2018): Starting the World TRIZ Sites Project (WTSP)    (May 19, 2018). 

[English page   ]  Toru Nakagawa (Japan); Alexander Kashkarov (Russia), Shahid Saleem Arshard (Australia), Maksymilian Smolnik (Poland), Juergen Jantschgi (Austria), Sebastian Koziolek (Poland), Simon Litvin (USA), Robert Adunka (Germany), Michael Orloff (Germany), Navneet Bhushan (India), Julian Vincent (UK), Tan Runhua (China), Yury Danilovsky (Korea), Denis Cavallucci (France), Dmitry Kucharavy (France), Roland De Guio (France), Sylvio Silveira Santos (Brazil), Shireen Al - Jaouni (Palestine - Jerusalem)
Starting the WTSP project is the main issue during this peirod.  Various trials for building the WTSP Catalog of TRIZ-related sites has been carried out first in Japan, and are reported and demonstrated to many TRIZ leaders across the world.  Responses by 17 TRIZ leaders are posted in this Forum page. 

[Japanese page: Toru Nakagawa; Administrator of 'Idea Generator', Chiharu Fukuda
Reports and announcements of WTSP, especially the output 'WTSP Catalog of 92 TRIZ-related sites in Japan (in Japanese)', are sent to many readers of "TRIZ Home Page in Japan". Communications with two blog site owners are recorded.

 WTSP Organization:  List of current Members, and the WTSP organization are posted. (May 19, 2018) 

 WTSP Letter:  For Forming WTSP Teams to Build WTSP Catalog in Each Country (Toru Nakagawa) (May 19, 2018) 

A WTSP Letter was sent on Apr. 24 to about 100 TRIZ leaders in the world for asking their support for the WTSP project.  We are at the stage of finishing the preparation and starting the actual work of building the WTSP Catalog, but our WTSP project is still very small and weak for carrying out the actual work.  Voluntary cooperative work are urged not only to the TRIZ leaders addressed but also to any TRIZ practitioners and TRIZ learners. 

 In summary, the current jobs for us to do in the WTSP Project are:
   (a) Please join the WTSP Project by sending your Membership Application Form to Nakagawa.
   (b) Form a team of WTSP Members in your own country; Volunteer to be Country Editor.
   (c) Record the Internet survey of TRIZ sites in your country and list the sites.
   (d) Write down introductions to the TRIZ sites one by one in your own language first.
   (e) Collect the manuscripts and make a Catalog of TRIZ-related sites of your country in your own language first.
   (f) Make a Catalog of selected TRIZ-related sites of your country in English (translation), and integrate it into the World Catalog.
Let’s work Together ! Connected !!

  WTSP Project:  Current Working Manuscripts of the WTSP Catalog are posted (Toru Nakagawa)   (Apr. 24, 2018). 

Only the sites new or revised from the Base document (version 2008) are shown.  The .docx file for each Region will be updated every 1-2 weeks, for the purpose of smooth collaboration in the WTSP project.
Update of Working files: (May 19, 2018)

  WTSP Outputs:  Catalog of TRIZ-related Sites in Japan (in English) (Toru Nakagawa)   (Apr. 4; Apr. 24, 2018). 

24 imporant TRIZ-related sites in Japan (type (a)) (and additional 68 sites) are introduced with annotation (and in shorter form) in English.  Most of the sites are written only in Japanese, but there are some sites written in English as well as in Japanese.  Some of the sites are particularly mentioned here briefly:
   01 (a) (d)  TRIZ Home Page in Japan (Toru Nakagawa):  Most active site since 1998 posting TRIZ articles and papers internationally.
   03 (a) (c)  Japan TRIZ Society (NPO):  Nation-wide center for promoting TRIZ, organizing Japan TRIZ Symposium every year.
   09 (a) (b) IDEA Corp. (Mamoru Zenko): Active consulting firm promoting integral use of QFD-TRIZ-TM and Goldfire software.
   10 (a) (b)  MOST (Kazuya Yamaguchi): Consulting firm promoting integral use of QFD-TRIZ-TM and AI (big data analysis).
   12 (a) (b)  Ideation Japan, Inc. (Teruyuki Kamimura):  Actively promoting Ideation-TRIZ, strong in IP field.
   14 (a) (g)  TRIZ Study (Shinsuke Kurosawa):  Posting many papers by G. Altshuller and other Russian authors in Japanese translation.
   16 (a) (b)  Pro-Engineers (Shigeru Kasuya):  An active consultant promoting TRIZ/USIT, posting many introductory articles.
   17 (a) (b)  IdeaPlant (Rikie Ishii):  Conducting workshops for enhancing idea generation; developed 'TRIZ Brainstorming Cards'.
   18 (a) (e)  Monodukuri.com (Osamu Kumasaka): Active portal site connecting Issues in monodukuri (60 issues) to Methods for solutions (118 methods) by getting support of many professionals.  This is a nice new business model, I think.

Catalogs like this in each country and at the global level should be very useful for many people who want to learn TRIZ and creative problem solving methods.  Learning the existence and activities of these many TRIZ-related sites, we TRIZ practitioners are much sitmulated: Let's work Together!, Connected!! for building up the world Catalog in World TRIZ Sites Project (WTSP)!!!


Photo: Toru, Mar. 31, 2018
at Kashiwanoha Park

Click the photo to enlarge


World TRIZ Sites Project (WTSP)


  WTSP Outputs:  Catalog of TRIZ-related Sites in Japan (in Japanese) (Toru Nakagawa)   (Mar. 17, 2018). 

In the Japanese page, a full manuscript for the Catalog of TRIZ-related Sites in Japan has been posted, as a preliminary part of the WTSP World Catalog.  It introduces over 90 sites, describing in 2 to 8 lines each.  It is remarkable that about 2/3 of the sites are new sites in these 10 years.  Almost all the sites are posted in Japanese only. 
In the present English page, I temporarily show 25 important sites in Japan, by simply listing the site name and its URL to the main page, without any further description.  Please give me time for preparing the English version.


Photo: Toru, Mar. 27, 2018
at Baden-Baden (Germany)

Click the photo to enlarge

TRIZ News: "The TRIZ Journal" has been re-launched already under the operation by Darrell Mann (Systematic Innovation, Inc.) (Jan. 30, 2018)

Thanks and Conglaturations!!!  Visit it with the URL: https://triz-journal.com/

WTSP Project: Starting the preparation of 'A Catalogue of TRIZ-related Sites in the World' (1) Findings through Practices in Japan (Toru Nakagawa) (Jan. 30,, 2018)  (2) For more practical ways of preparation (Toru Nakagawa) (Feb. 7; Feb. 11; Feb. 12, 2018)

For the actual start of preparing 'A Catalogue of TRIZ-related Sites in the World', I am now working to search and collect TRIZ-related Sites in Japan and to write brief introductions to them.   I now realize that we need to handle a huge volume of information, even exceeding my expectation.  Here are some findings and suggestions for our work.  [** Notice: Depending on countries there seem various differences in the options of search engines and in the situations of TRIZ-related sites.  Thus in each coutry, please adapt/modify your practical procedures to meet our common goal.]
For the search of TRIZ-related sites, we should better use Yahoo! instead of Google, with the keyword of 'TRIZ' and with the settings of 'Local area', 'Our own language', and the option of 'Display the link for searching inside the site'. Copy the full results of the search onto a document while keeping the hyperlinks active.

For each site shown in the search results, carry out the search inside the site; then we can get the search results of many TRIZ-relevant pages inside the site.  Visit each site actually to take a look at important pages and write a brief introduction to the site. (Description in the Guideline is revised as: 'Single line introduction' ==> 'Brief introduction' (in 2 to 4 lines, in a free format).
Because of much diversity among the sites, we are going to classify them according to their nature into 9 Categories, such as (a) TRIZ information sending sites, (b) Consultants etc. in TRIZ, (c) Academic societies, etc. (d) Universities, etc.   Depending on the nature of the site, quality and quantity of information, and importance, etc., we should introduce important sites closely to some detail, while less important ones just briefly.
There exist many important relevant sites without mentioning TRIZ explicitly. So we should carry out broader searching for them at the second stage.  How to search them and how to arrange them in our (second type of) Catalogue of TRIZ-related Sites are now under consideration by our 'Global Co-editor' Darrell Mann.
Project members are encouraged to start the search and description work in their own country in the manner describe above and in the Guidelines.

On the basis of the policy in (1), a more practical way of describing individual TRIZ sites and list of them has been shown by relaxing the Guidelines. MS Word instead of Excel may be used, and plain text formats may be easier to write than tabular formats.  A Word file  of the 'Selected 120 TRIZ Sites in the World' (composed by Nakagawa in 2008) is going to be used as the sample and base document for updating and enhancement.  Corresponding to this practical ways, the WTSP Guideline is revised partly. (Feb. 7, 2018)

The base document is posted openly in the WTSP platform (https://trizsites.bitrix24.com/~1AshD )   and in this Web site "TRIZ Home Page in Japan" .  File name is: WTSP-ListSites-Global-Stage0-180210.docx . See the Instructions in the File how to review and revise this Catalog of Sites.   Revised versions of the document will be publicized in the WTSP platform (probably every month or two) and also in this Web site (probalbly in a shorter interval).  (Feb. 11, 2018). 

Another important change in the Membership: WTSP members may or may not use the WTSP platform. Since many people are too busy to learn the Bitrix24 operations, they prefer to use their ordinary tools of MS Word and emails. See the page WTSP (A2) Organization . (Feb. 12, 2018) 


Snow at Kenrokuen Park (Kanazawa)
Photo by Toru, Feb. 5, 2018

Click to enlarge

  TRIZ News:  TRIZ News in Japan   (Jan. 25, 2018)

Japan Creativity Society (JCS) and Kindai University are going to hold International Conference on Creativity and Innovation (ICCI2018) on Sept. 10-12, 2018 in Osaka, Japan  (Jan. 25, 2018)

Japan TRIZ Society (JTS) is going to hold 14th TRIZ Symposium in Japan on Sept. 13 - 14, 2018 in Tokyo. (Jan. 25, 2018)

  TRIZ News:  TRIZ News Outside Japan   (Jan. 25, 2018)

ETRIA TRIZ Future Conference 2018 will be held on Oct. 29 - 31, 2018 at INSA Strasbourg, Strasbourg, France. (Jan. 25, 2018)

TRIZfest-2018 Conference and related events will be held on Sept. 13-15, 2018 in Lisbon, Portugal.   (Jan. 25, 2018)

ICSI 2018 is to be held on Jul. 18-21, 2018, in Hsinchu, Taiwan. (Jan. 25, 2018)

TRIZCON2018 will be held on May 6-9, 2018 at Purdue University, West Lafayette, IN, USA (Jan. 25, 2018)

 From the Editor:  Message for the New Year 2018 (Toru Nakagawa)  (Jan. 25, 2018)

Greetings from Japan for a Happy New Year 2018!! Wish the year be peaceful in the World, and healthy, happy, and successful for you all.  Posted is an English translation of my New Year Card which I sent to about 200 friends in Japan whom I met before my TRIZ days. 

Happy New Year 2018 !!
Since my retirement of OGU in 2012, I have been continuing my research and proliferation activities on the methodologies of creative problem solving. I am trying to extend application areas of the methodology from technolgies to social/human areas.
At the base of social problems related to poverty, we find the conflicts in arguments for self-responsivility and for mutual help. And further down at the root, I have found the 'Principal Contradiction of Human Culture', as show in the figure (right). The two Principal Principles 'Liberty' and 'Love' do conflict everywhere. 'Ethics' is supposed to motivate and coordinate the two Principles, but it should overcome the basic inclination of 'Obedience' in old 'Morals' and stand on the basis of dignity and essencial equality of every person. The three Principal Principles, i.e. Liberty, Love, and Ethics, should be establlished in every person and every organization/society. 
The swallows in the photo show naturally and sincerely 'Liberty, Love, and Ethics'.
I wish you all for your health and success, and for a peaceful new year.
January 1st, 2018   Toru Nakagawa

New Year Greeting Card (Toru Nakagawa)
Click to enlarge

Posted in 2017

WTSP Project: Index Page of World TRIZ Sites Project (WTSP) is Open for Up-to-date Basic Information and Activitiy News (Toru Nakagawa) (Dec. 27,, 2017)

Index Page of WTSP Project is open in this Web site for posting (A) basic WTSP information (keeping up-to-date) and (B) up-to-date announcements of activities, invitations, outputs, etc.  Following 7 pages are posted with detailed information in English.  We wish your support and collaboration, Together ! Connected !!

(A1) Policies ( Aims ,  Goals of Outputs , Documentation process , Organizing the Project Team )

(A2) Organization ( Invitation to Membership ,  Joining as a Member , Organizing a Team and Roles we need , Current organization and Members )

(A3) Platform (for working as voluntary members)  ( Outline of the Bitrix24 Groupware System   Our WTSP Platform in the Bitrix24 system  , Brief Introduction of using the Bitrix24 platform for documentation )

(A4) Guidelines (Guidelines of describing Sites and Lists of Sites , Handling the documents in 3 main stages (i.e., drafts, manuscripts under internal review, and output publicized openly) , Handling documents in countries,regions, and the world , Handling documents in English and also in various non-English languages , Structuring documents in a categorized system )

(A5) Accesses to the Project outputs by people outside the Project  ( Public Links to the Output Documents in the WTSP Platform ; Usage of the Outputs Documents )

(A6) Publicized outputs  ( Basic information of the WTSP Project , Output Documents of the WTSP Project   (to be annonced later) )

(B1) WTSP News 2017


Screen shot of WTSP Platform
in the process of handling documents  
Click the image to enlarge

  TRIZ Forum:  Letters from Readers (Nov. - Dec., 2017)/ Initializing 'World TRIZ Sites Project'   (Dec. 17, 2017)  Index page of "Letters from Readers"

[English page ]  Toru Nakagawa (Japan); Vladimir Petrov (Israel), Shireen Al - Jaouni (Jerusalem), Alexander Theodor Narbut (Ukraine), Mohammad Reza Nouroozi (Iran), Simon Dewulf (Australia), Tan Runhua (China), Oleg Kraev (for Yuri Salamatov) (Russia), Nina Defounga (Germany), Nikolay Shpakovsky (Russia), Valeri Souchkov (Netherlands), Darrell Mann (UK), Davide Russo (Italy), Tanasak Pheunghua (Thailand), Michael Orloff (Germany), Ian Mitchell (UK), Leszek Chybowski (Poland), Ellen Domb (USA), Kai Hiltmann (Germany), T.S. Yeoh (Malaysia), 蔡易坤 (for Prof. Lingling Luo) (China), Yury Danilovsky (Korea/Russia); Eyad Khalifeh (Canada/Israel)
This page ’Letters from Readers' is for recording various communications between readers in the world and the Editor. However, the present page covering Nov.- Dec. 2017 is very unique and devoted for the records of communications mostly issued by Toru Nakagawa for proposing 'World TRIZ Sites Project' and responses to them by many TRIZ Leaders in the world. The Proposals and Invitations of the Project are posted here on Dec. 9, 2017, as an ordinary document so to speak. In the present page, on the other hand, you can see why and how Nakagawa wanted and initiated the Project and how so many people in various countries responded positively to support and join the Project. Such a consensus of necessity of 'World TRIZ Sites Project' certainly becomes our motivation to 'Build a (big) page of TRIZ Sites in the World' and further for us, TRIZ community in the world, to work Together! Connected !! 

[Japanese page ] Toru Nakagawa; Yoshihiro Kosaka, Prof. Kozo Kuchitsu, Tsunehisa Maekawa, Hidetake Sakuma, Tomomi Murata
Prof. Kuchitsu encourages me.  He is Professor Emeritus of Univ. of Tokyo and is just retired officially at the age of 90 and still keeps academic/educational communications with people in Japan and in the world.  H. Sakuma regularly distributes his 'Human Factor Safety Reports' analyzing various accidents/failures.  He categorizes errors in 3 types, i.e., Random errors, Systematic errors, and Sporadic errors.  Education and training is useful against Random errors, and training of design procedures is necessary against Systematic errors; but neither of them cannot prevent Sporadic errors, which come out sub-consciously.  He says Human-Factor solutions have to be trained for preventing Sporadic errors.

Forum (From the Editor): World TRIZ Sites Project: Its Plan and Invitation: Volunteer Project for Connecting TRIZ Sites in the World (Toru Nakagawa) (Dec. 9,, 2017)

Receiving positive feedbacks by a number of TRIZ Leaders, I have sent an official Invitation to the 95 TRIZ Leaders for starting the World TRIZ Sites Project.  Please note, however, that the Project is open for any TRIZ Leaders/Colleagues who volunteer to work for the sake of TRIZ, Together ! Connected!!   The Invitation Letter summarizes the purpose and philosophy of the Project and describes how we are going to work together with the platform in Bitrix24 system in cloud.  Descriptions of individual sites and lists of them are to be made in a bottom-up manner, being structured according to countries, then regions, and finally the whole world, and also being refined through the processes of drafting, reviewing/revising, and publicizing.  The project team is going to be organized in a way to match with the documentation processes.

We eagerly wish you, Leaders and Colleagues in TRIZ (in a wider sense), to join our World TRIZ Sites Project as a voluntary member, or to support us (being outside the Project) by describing your own (or neighboring) TRIZ sites and contributing it to the Project.    The Invitation Letter writes concrete instructions about Membership Application Form, process of opening an account in the platform, templates and samples of site (and list of sites) description, a method for public accessing to our open documents in the platform.

Forum (From the Editor): World TRIZ Sites Project: Proposals: Volunteer Project for Connecting TRIZ Sites in the World (Toru Nakagawa) (Dec. 9,, 2017)

Since 3 weeks ago, I sent a series of emails to 95 TRIZ Leaders (of 33 Countries) in the world.  They are proposals of volunteer work together as 'World TRIZ Sites Project'.  It intends to build a page of listing and introducing TRIZ sites in the world, by the collaboration of TRIZ leaders/colleagues.  I built such a page in 2008, 'Extended 120 TRIZ Links in the World' , but could not update it for 10 years.  Since then I have been advocating a vision 'Global Network of Public Web Sites in TRIZ: A Proposal for Building A Global TRIZ Community' .  The present project will become a practical step forward to such a goal. Our Symbol Mark shows this motive clearly.  Here are the four documents of Proposal, which are made clearer step by step by receiving positive feedbacks:

    Proposal (1)   Please help to Build a page of 300 TRIZ Sites in the World  (Toru Nakagawa, Nov. 21, 2017)
    Proposal (1A)  Let’s Cooperate with the platform of TRIZSites.bitrix24.com (Toru Nakagawa, Nov. 22, 2017)
    Proposal (1B)  World TRIZ Sites Project: Guidelines of Describing TRIZ Sites and Their Lists (Toru Nakagawa, Nov. 27, 2017)
    Proposal (1C)  World TRIZ Sites Project: Organizing the Project Team (Toru Nakagawa, Nov. 28, 2017)


World TRIZ Sites Project
Symbol Mark
Click the image to enlarge


From the Editor: Failures in searching for pages of the present site have been recovered (Toru Nakagawa) (Nov. 16, 2017)

The present site "TRIZ Home Page in Japan" was found to have blocked the page searches by softbots (Google, Yafoo, etc.) since half a year ago due to some mishandling in our Web server; now this error has been corrected.  Internal search of pages was not working nearly 2 years due to unknown causes, but has been recovered today .  I deeply apologize for your  inconveniences for so long time, and beg your patience for some more months until recovering the hit ratio.  I also notice that many backlogs exist, e.g., updating global/domestic TRIZ site links (since 2008), and posting recent development of TRIZ-related software tools, etc.  I wish to have voluteers for supporting this site, and those for operating TRIZ Web sites in different countries/communities for forming 'Global Network of Public Web Sites in TRIZ' .

 Paper: TRIZ in China: TRIZ,The Development And Dissemination In Industries In China (Runhua Tan, China)   (Nov. 5, 2017)

Early October, two international TRIZ conferences were held at the same time; they are ETRIA TRIZ Future Conference (TFC2017) in Lappeenranta, Finland and Altshuller Institute for TRIZ Studies Annual Conference (TRIZCON2017) in Atlantic City, NJ, USA.  Among many presentations, I am much interested in the paper given by 'National Engineering Research Center for Technological Innovation Method and Tool, Hebei University of Technology (Tianjin, China)' at the both conferences.  On my request, Professor Tan sent me his TRIZCON paper and presentation slides.  Thanks to the Author's and Altshuller Institute's permissions, I am very happy to post this paper in "TRIZ Home Page in Japan" both in English and in Japanese translation.

Research and dissemination of TRIZ in China have been developed recently in a surprising speed and extent, we learn, in comparison to the former two reviews: by Zhao Xinjun (Northeastern Univ.) in Nov. 2004 and by Xian-yong Zhou (Southwest Jiantong Univ.) in Nov. 2011 .  According to Dr. Bai, the Research Center is led by Professor Runhua Tan, having about 80 faculty members, about 20 PhD students, and about 80 postgraduate students (corrected on Nov. 7, 2017), and is devoted to research, education, and dissemination of methodologies and tools for technological innovation with TRIZ at its core.  China seems to have many more research centers on innovation methods based on TRIZ, under strong supports by national and regional governments.

The Center has developed 'an integrated system of methodologies for innovation on the basis of TRIZ', in the name of C-TRIZ (Chinese version of extended TRIZ). This paper introduces its overview.
They have been actively disseminating C-TRIZ into industries by using MEOTM (Mass-Engineer Oriented Training Model).  The trainings last for half a year or full year (mostly using weekends) with lessons and real practices.  One or multiple companies are selected first, and then the participating engineers are selected for organizing a training class.  Every engineer has to bring in an 'inventive problem' related to his/her own job or company, and during the training course he/she has to define the problem clearly, solve the problem, and present the results at open oral defence in order to be certified as an 'innovative engineer'. From 2013 till 2016, the center carried out 40 training classes, covering 721 companies, with 3173 participating engineers in total, and produced 1471 certified engineers, they report.  

  TRIZ Forum:  Letters from Readers (Aug. - Oct., 2017)   (Nov. 5; Nov. 12, 2017)  Index page of "Letters from Readers"

[English page ]  Simon Dewulf (Australia), Valeri Souchkov (The Netherlands), Shireen Al - Jaouni (Jerusalem), Isak Bukhman (USA), Sung-Wook Kang (Korea), Toru Nakagawa; Added in English translation: Naohiko Takayama (Japan), Toru Nakagawa, Andrei Seryi (UK) (Nov. 12, 2017)

I received with thanks these short but warm and encouraging communications.  Mr. Kang handed me a message card in Finland appreciating my activities as a model for himself; I was very much surprised and feel honored.
On a request from Prof. A. Seryi, communications between N. Takayama and Nakagawa are posted in English translation. And a short note is inserted for introducing Prof. Eiichi Yamaguchi's work on Innovation diagram. (Nov. 12, 2017)

[Japanese page ] Tadasuke Mizutani, Yasumasa Ikezoe, Kou Haginoya, Akihiro Katahira, Katsushige Hino, Kouji Otani, Naohiko Takayama, Toru Nakagawa
From 4 people (Mizutani, Ikezoe, Haginoya, and Hino) I received comments and questions on my articles about 'Liberty vs. Love' contradiction and Ethics, and I replied them one by one for clarifying various points of discussions.  Katahira announces a new version of his Fuda-Yose tool for visualization, and Hino asks me a question about the TRIZ' view of AI.  Otani introduces me about the activities of 'Japan Society of Early Stage Dementia'.  Takayama discusses about idea generation in physics, in relation to A. Seryi's Keynote.   


Red leaves
(Helsinki, Finland)
Toru (Oct. 7, 2017)
Click the image to enlarge

  On the 19th Anniversary of  "TRIZ Home Page in Japan":  (Editor Toru Nakagawa)   (Nov. 5, 2017)

This Web site "TRIZ Home in Japan" celebrates its 19th Anniversary on Nov. 1.  I am very grateful to you all, including authors, translators, and readers in Japan and around the world, for your continuing support.  This site serves as an open forum of information exchange for better understanding and usage of Creative Problem Solving Methodologies.  Initially, I intended to introduce TRIZ, a Russian-based methodology for mostly technological areas, but year after year the scope of this site became wider and deeper along with the development of such methodologies.  TRIZ itself has evolved to wider application including business and marketing, and has been spreading widely in the world.  My own research has extended to USIT as an easy-to-learn TRIZ, the Six-Box Scheme as a new paradigm of creative problem solving, and CrePS (General Methodology of Creative Problem Solving) which intends to integrate and unify various methods by using the Six-Box Scheme.  Since 2015, I have been trying to apply them to social problems, especially for revealing the fundamental contradictions in Human Culture and investigating the relationships of Liberty-Love-Ethics.  Thus the scope and contents of this site have been slightly changing as a result of natural evolution.

This site is meant to openly publish information and communications on a not-for-profit basis.  Though I have been operating this site as a volunteer, this site is not a personal site but a public forum to be composed of the contributions by readers, as you see already.  Most pages are published in Japanese and in English in parallel for the purpose of mutual understanding and collaboration between Japanese and overseas people.  I envisage that Pubic Web Sites built in different countries/communities will form A Global (TRIZ) Community with much reduced language barriers Four Entrance Pages have been installed in 2012 for your easy access to articles.  The number of visits since November 2005 is (on Nov. 5) 233,673 (increasing by about 3,400 for the last 1 year) to the top page in Japanese and 41,640 (increasing by about 1,200) to that in English.  I wish this Home Page be useful for you readers to solve your various problems.  Readers' contributions either in English or in Japanese are heartily welcome.


 Keynote: TRIZ for Science: Evolution of Scientific Instruments & Methodology of Inventiveness in Applications to Science (Andrei A. Seryi, UK)   (Oct. 17, 2017)

This impressive Keynote Lecture was given by Professor Andrei Seryi at ETRIA TFC2017 held two weeks ago in Lappeenranta, Finland.  Under his kind permission, I am posting his presentation slides (110 pages in PDF ) here in HTML with (new) section headers and GIF images for easier overall understanding. 
(Note: ETRIA is working for publishing the TFC2017 papers in a book/journal from some publisher, thus stopping the authors to post their papers/slides at any Web site.  Keynote lectures, however, are not included in the publication plan and hence are allowed for posting at a Web site by the author's decision.)

Professor Andrei Seryi  graduated Novosibirsk State University (NSU) Physics Department in 1986 and worked in Russia, France, USA (Fermi lab and Stanford Linear Accelerator Center (1999-2010)) in the fields of high-energy physics, and since 2010 he is Director of John Adams Institute for Accelerator Science , the University of Oxford, in UK.  As a Director he has become to consider more seriously about the usefulness of high-energy physics and to teach creativity methods in scientific research.  So he met TRIZ again (since his childhood) and found its depth.

The present Keynote contains detailed figures of scientific instruments for cutting-edge physics, and you may feel difficult to understand the background physics, so do I.  However, the author shows the essential points of discussion clearly and plainly for people having interest in science in general.  E.g., be careful (and needs methodology) in the prediction of future, evaluate different research directions not only for fundamental knowledge but also for usefulness and the costs.
Author's insights of using TRIZ are deep.  In explaining Inventive Principle 35 'Parameter change', he demonstrates (in place of simple parameters volume V and surface area S) the ratio V/S inspires us much more while changing the parameter value.  He also mentions that Cloud chamber and Bubble chamber, both for detecting high-energy particles, are an example of TRIZ concept of 'System and Anti-system' and that if scientists were familiar with the concept, Bubble chamber could have been invented much earlier. 'Transition to super-system' is also an important TRIZ concept in understanding the evolution of systems.  New methods/tools are implemented as a system by assembling many components, and then they become useful only when working as a part of larger systems (i.e., super-system) for social, business, technical, etc. purposes. 

"TRIZ can be very useful for science, as an inspiration, as a very efficient toolbox, as a way to connect different disciplines, as a new way to see the world" -- This is the conclusion by Professor Seryi.  It is a testimonial by a leading scientist who has achieved a lot in physics and mastered TRIZ.   We wish TRIZ be understood widely and used in practice in the field of science, by many researchers and engineers.
--- TRIZ can support science well in the aspect 'scientific revolutions are tool-driven', as shown in this keynote.  TRIZ can support science also in the aspect 'scientific revolutions are concept-driven'? -- This is an open question.  Please refer a discussion page .


Yellow leaves
(Lappeenranta, Finland)
Toru (Oct. 4, 2017)
Click the image to enlarge


General Index: Outline    [Categorized table of all articles (in English/Japanese) accessible with a single click.] 
                                                          [Kept always up to date.  (Checked and improved on Jan. 9, 2013)]

General Index page Categories (table color, link to general index outline)

(A) Parent page and Editorial

Parent page   ; Editorial    ; Entrance pages   ;  New Information    ;  Introduction to TRIZ  

(B) References

TRIZ References    ;  TRIZ Links ;  TRIZ News and Activities   ;  TRIZ Software Tools  

(C) Papers

Papers   ;  Case Studies   ;  Presentations, Research reports, Technical reports, etc.  ; Introductory articles and review articles
TRIZ Classics  ;  Course Materials and Textbooks  ;  Lecture Notes  ;  Lecture Notes on Related Topics ;    Articles in Related Areas

Documents of the CrePS Methodology  ;  USIT Process

(D) Forum

Conference & Seminar Reports   ;  Book Reviews and Introduction to References   ;  Communications, Discussions, Questions, Opinions, Comments, etc.    ;  Collabo: Collaboration Pages with TRIZ Promoters
Home Pages by Students


General Index  (A) Editorial (B) References Links News & activities Software tools (C) Papers, case studies, articles, Lectures, course materials   (D) Forum General Index 
Home Page New Information for children and highschool students for students and the general public for engineers (introduction) for Practitioners CrePS System Documents USIT Manual & Case Studies WTSP (World TRIZ Sites Project) Search in this site Home Page

  Questions, comments, submissions, etc. on this home page are welcome via e-mail to:
    Toru Nakagawa,  Dr.,  Professor Emeritus, Osaka Gakuin University
    E-mail: nakagawa@ogu.ac.jp [The same as before retirement.   Email is the main communication channel.]
    3-1-13 Eirakudai, Kashiwa, Chiba 277-0086, Japan.    Phone & FAX:  +81-4-7167-7403