TRIZ Forum:

Memorial of Mr. Masatoshi Hotta

Toru Nakagawa, Ellen Domb (USA)

Editor: Toru Nakagawa (Osaka Gakuin Univ.)

Posted on Jun. 25, 2018; Updated: Jun. 26, 2018
buttons guide you to the pages written in Japanese.

Editor's Note (Toru Nakagawa, Jun. 21, 2018)

Mr. Masatoshi Hotta passed away on June 8, 2018.   His wake was on June 12, and funeral service on June 13.

I was noticed the news on Jun. 12 by Mr. Yoshihisa Konishi, but could not attend the services because of my seminar trip in Wakayama Prefecture on Jun. 12-14.  I sent a condolence telegram for the funeral service.

Thanking for his so much contributions to the introduction and promotion of TRIZ into Japan, a page of Memorial of Mr. Masatoshi Hotta is prepared here.  Please contribute information of him and messages to him.

Note:  The photo of all the participants of the 1st Japan TRIZ Symposium (2005) is clear to see Mr. Hotta among many TRIZ promoters & users.


  Late Mr. Masatoshi Hotta:  His career and his works    (Please send us information)






In Mitsubishi Research Institute (MRI), he formed Knowlege Creation Research Department and started to introduce TRIZ into Japan in contract with Invention Machine Corporation.


Organized the Users Group and held seminars regularly every month.


Completed the Japanese Edition of IM TechOptimizer software by the Consortium of Japanese user industries




Leaving MRI and started a TRIZ consulting firm Sozo Kaihatsu Initiative (SKI)


Published Japanese editions of Darrell Mann's books on Systematic Innovation and Matrix 2003


Involved in organizing Japan TRIZ CB (Collaborative Board of TRIZ Promoters and Users in Japan) as the Managing Director and held First Japan TRIZ Symposium (later every year)


Involved in organizing NPO Japan TRIZ Society as the Managing Director




Quitted SKI and resigned the Managing Director of Japan TRIZ Society

Jun. 8, 2018

Passed away.



  Messages in Memory of Late Mr. Masatoshi Hotta             (Please contribute your messages)

  Toru Nakagawa (Osaka Gakuin Univ.)    Condolesence Telegram (Jun. 13, 2018)

Receiving the news of your husband's death, I am much surprised and offer you my deepest condolesence.

Mr. Masatoshi Hotta is the pioneering leader of introducing and disseminating the Inventive Problem Solving Methodology TRIZ into Japan.   In 1997, he organized Knowledge Creation Research Department in Mitsubishi Research Institute and started to introduce software and methodology of TRIZ into many manufacturing industries in Japan.   As one of such industrial users, I got a chance of trial use of the TRIZ software for 3 months and mastered TRIZ.  Moving next year to a university, I have been working for the research and dissemination of TRIZ for many years together with Mr. Hotta as a very close colleague in TRIZ. 

We have worked together for seminars and meetings of MRI users group, publishing Darrell Mann's TRIZ books in Japanese translation, organizing and managing Japan TRIZ CB and Japan TRIZ Society, holding Japan TRIZ Symposium every year, etc. etc.  Mr. Hotta was the keyperson in these activities and projects as the cordinator, promoter, managing secretary, and manager.  He has been the important pillar of TRIZ promotion in Japan. 

At the end of 2012, he quitted his TRIZ consulting firm SKI, and retired from all his official activities.  I did not have any chance of meeting him again since then, to my regret.

I now recall Mr. Hotta's strong will of decision and activities, and his warm heart of accepting and supporting people, together with various memories of working together with him.

I pray sincerely for peace and happiness of Mr. Masatoshi Hotta's soul and his bereaved family.

  Ellen Domb (USA)    Jun. 26, 2018

I was saddened to hear of the passing of Mr. Masatoshi Hotta.   I knew him through his work for MRI and Invention Machine.   He understood very early how the interplay between the basic theory of TRIZ and the practical tools of the software system could benefit his clients.    Many people do not know that he arranged financial sponsorship for the TRIZ Journal during the early days when I was the publisher, which was very helpful in keeping the website running.   In return we arranged permissions for the translation of many articles into Japanese, which he used for the education of his clients.

He was a gracious host on my visit to Japan, helping me to understand the ways that traditional Japanese culture and engineering practices were in harmony with TRIZ, and he was generous in sharing his knowledge at conferences.   

It is an honor to have had Mr. Masatoshi Hotta as a colleague.   My sympathy goes out to all his family and friends on the loss of this good person.

Ellen Domb






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