| 1973 |
Born in Gunma. |
| 1986-01 |
Established in Shinjuku-ku, Tokyo, Imaginia Co., Ltd. with a capital of 100 million yen, with the primary purpose of developing, manufacturing, and selling game software. |
| 1986-11 |
Released 'Ginga Denshou' as a media-mix type Famicom software. |
| 1988-02 |
Released 'Matsumoto Takashi's Stock Winning Theory' as an adult-oriented Famicom software. |
| 1990-03 |
Ventured into acquiring overseas PC game licenses and released the PC city development simulation software 'SimCity'. |
| 1990-12 |
Released 'Populus' for Super Famicom. |
| 1992 |
Graduated from Ota High School, Gunma Prefecture. |
| 1994 |
Received the 'Inamori Management Award'. |
| 1995-05 |
Released 'SimCity 2000' for Super Famicom. |
| 1995-05 |
Released "SimCity 2000" for Super Famicom. |
| 1995-08 |
Produced and released the 'Yukinou Juku' series of educational software for young children. |
| 1996 |
Graduated from Keio University Faculty of Science and Technology. Joined Imaginia the same year. After working in public relations and educational software sales, became head of the mobile media business. |
| 1996 |
Public listing of shares. |
| 1996-07 |
Registered shares with the Japan Securities Dealers Association. |
| 1996-12 |
Released 'Super Space Night Pro Baseball King' for Nintendo 64. |
| 1996-12 |
Launched the 'Goukaku Boy' series of learning software for Game Boy. |
| 1996-12 |
Released "Super Space Night Pro Baseball King" for Nintendo 64. |
| 1996-12 |
Launched "Goukaku Boy Series" learning software for Game Boy. |
| 1997-02 |
Capital increased to 2,669 million yen through a public offering. |
| 1997-02 |
Capital increased to 2,669 million yen through a public offering. |
| 1997-11 |
Released 'Medarot' for Game Boy. |
| 1997-11 |
Released "Medarot" for Game Boy. |
| 1998-08 |
Released the 'Pocket Hello Kitty' handheld game console with pedometer function. |
| 1998-08 |
Released "Pocket Hello Kitty" handheld game console with pedometer function. |
| 1998-11 |
Released the Game Boy Color software 'Sanrio TimeNet'. |
| 1998-11 |
Released "Sanrio Time Net" for Game Boy Color. |
| 1998-12 |
Established TimeNet Co., Ltd., a character management company, jointly with Sanrio Co., Ltd. |
| 1998-12 |
Established TimeNet Co., Ltd., a character management company, in collaboration with Sanrio Co., Ltd. |
| 1999-08 |
Launched the i-mode mobile phone content 'Hello Kitty's Easy Calendar'. |
| 2000 |
Assumed the position of President and CEO. |
| 2003-02 |
Implemented an executive officer system to strengthen the management structure through faster decision‑making and business execution. |
| 2003-06 |
Appointed as executive officer, and in June of the same year became a director, overseeing the entire business division. |
| 2004-10 |
Launched the i-mode mobile phone content 'Relaxma Anytime'. |
| 2004-10 |
Acquired Katsuta Golf Club in Ibaraki Prefecture to strengthen the golf services business. |
| 2004-12 |
Cancelled the on‑floor registration with the Japan Securities Dealers Association and listed shares on the JASDAQ Securities Exchange. |
| 2004-12 |
Dissolved TimeNet Co., Ltd. to review the character business. |
| 2004-12 |
Dissolved TimeNet Co., Ltd. to review the character business. |
| 2005-04 |
Acquired shares of Rocket Company Co., Ltd. and made it a subsidiary to strengthen the packaged software business. |
| 2006 |
Assumed the role of President and COO. |
| 2006 |
Established Imaginia Inc. and became its President. |
| 2006 |
Assumed the position of Chairman and CEO. |
| 2006-09 |
Released the Nintendo DS software 'Japanese Kanji Proficiency Test (KanKen) DS' certified by the Japan Kanji Aptitude Test Foundation. |
| 2006-09 |
Released the Nintendo DS software 'Kanji Kentei DS' certified by the Japan Kanji Aptitude Test Association. |
| 2006-10 |
Determined that the initial purpose of accumulating service know‑how and understanding customer needs had been achieved, and sold Katsuta Golf Club in Ibaraki Prefecture. |
| 2007 |
Zao Onsen Tourism Ambassador (current). Miyagi Kizuna Ambassador (current). |
| 2008-08 |
Decided to enter the investment education business sector. |
| 2008-10 |
Released the Wii software 'Shape Boxing: Enjoy Diet on Wii!'. |
| 2009 |
Graduated from the University of Tokyo Executive Management Program (abbreviated as Todai EMP) (second cohort). |
| 2010-04 |
Listed on the Osaka Securities Exchange JASDAQ Standard market following the merger of the JASDAQ Securities Exchange and the Osaka Securities Exchange. |
| 2010-04 |
Commenced provision to Resona Bank. |
| 2010-04 |
Started providing the 'Investment Trust Proposal Support System' to Resona Bank. |
| 2011 |
Member of the Miyagi Prefecture Disaster Recovery Conference (Chair: Hiroshi Komiyama, Chairman of Mitsubishi Research Institute, 28th President of the University of Tokyo). |
| 2013-04 |
Divided the investment education business into Imaginia Investment Education Co., Ltd. to enhance expertise and accelerate decision‑making in the investment education sector. |
| 2013-07 |
Listed on the Tokyo Stock Exchange JASDAQ Standard market following the integration of the Tokyo Stock Exchange and the Osaka Stock Exchange. |
| 2014-02 |
Launched the educational video service '10MTV Opinion' in partnership with NTT Docomo. |
| 2014-10 |
Commenced content provision to China. |
| 2014-11 |
Launched the smartphone app 'KanKen Start' in collaboration with the KanKen Association. |
| 2015-01 |
Established a Shanghai office to promote content business in China. |
| 2015-10 |
Established SoWhat Inc. to strengthen content business. |
| 2015-10 |
Established SoWhat Inc. to strengthen the content business. |
| 2016 |
Vice Chairman (Representative Director) of the Panasonic Public Interest Foundation's Political and Economic Institute. |
| 2016-06 |
Transitioned to a company with an Audit Committee to further enhance corporate governance. |
| 2016-07 |
Absorbed subsidiary Rocket Company Inc. in a strategic review of the package software business. |
| 2017-04 |
Service launch of the first LINE game "LINE Akindo Star Little Peso" from consolidated subsidiary SoWhat Inc. |
| 2017-04 |
Launched the service for 'LINE Akindo Star Little Peso', the first LINE game from consolidated subsidiary SoWhat Inc. |
| 2018-02 |
Started providing the smartphone game "Sumisumi" featuring all characters from San-X. |
| 2018-02 |
Started providing the smartphone game 'Sumisumi', featuring all characters from San-X. |
| 2018-12 |
Released "Fit Boxing" for Nintendo Switch. |
| 2019 |
Assumed the role of Chairman and Founder of the Board of Directors. |
| 2020-01 |
Launched service for smartphone game "Medarot S". |
| 2020-12 |
Released "Fit Boxing 2 - Rhythm & Exercise -" for Nintendo Switch. |
| 2022-04 |
Transitioned to the Tokyo Stock Exchange Standard Market following market restructuring. |
| 2024-11 |
Released "Disney Music Parade Encore" for Nintendo Switch. |
| 2024-11 |
Released the Nintendo Switch game 'Disney Music Parade Encore'. |
| 2024-12 |
Released "Fit Boxing 3 - Your Personal Trainer -" for Nintendo Switch. |
| 2024-12 |
Released the Nintendo Switch game 'Fit Boxing 3 - Your Personal Trainer'. |
| 2025-10 |
Released the Nintendo Switch game 'Movie: Sumikko Gurashi: The Kingdom of the Sky and Two Characters Play Cross'. |
| 2025-12 |
Released the Nintendo Switch game 'Disney Miranes Fitness'. |
