![Mitsugu Iwasa](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%231b1b1b" class="bi bi-person-fill" viewBox="0 0 16 16"><path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6"/></svg>)
Mitsugu Iwasa
Chairman at
Riso Welfare KK
Net worth: 9 M $ as of 2026-06-29
Profile
Mitsugu Iwasa is the founder of Riso Kyoiku Group Corp., founded in 1985, and served as Chairman & President from 2001 to 2008.
Mr. Iwasa is currently Chairman of Riso Welfare KK since 2012.
Former jobs include Chairman at School Tomas Co., Ltd. from 2000 to 2014, Chairman at Meimonkai KK, Chairman at Shingakai Co., Ltd., and Chairman & President at Inter TOMAS Co., Ltd.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 2025-08-30 | 5,963,180 ( 3.47% ) | 7 M $ | 2026-06-29 | |
Data Horizon Co., Ltd.
 Data Horizon Co., Ltd. Packaged SoftwareTechnology Services Engages in the business of medical-related information services 3.99% | 2025-09-29 | 507,800 ( 3.99% ) | 1 M $ | 2026-06-29 |
Mitsugu Iwasa active positions
| Companies | Position | Start |
|---|---|---|
Riso Welfare KK | Chairman | 2012-09-30 |
Former positions of Mitsugu Iwasa
| Companies | Position | End |
|---|---|---|
Inter TOMAS Co., Ltd.
 Inter TOMAS Co., Ltd. Miscellaneous Commercial ServicesCommercial Services Provides language education services | Chairman | - |
School Tomas Co., Ltd.
 School Tomas Co., Ltd. Miscellaneous Commercial ServicesCommercial Services Operates Internet telephone based real time education services | Chairman | - |
Meimonkai KK
 Meimonkai KK Other Consumer ServicesConsumer Services Operates schools | Chairman | - |
Shingakai Co., Ltd. | Chairman | - |
| RISO KYOIKU GROUP CORPORATION | Founder | - |
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
1
1st degree connections
6
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 6 |
|---|---|
Riso Kyoiku Co., Ltd.
 Riso Kyoiku Co., Ltd. Other Consumer ServicesConsumer Services Operates cram school | Consumer Services |
School Tomas Co., Ltd.
School Tomas Co., Ltd. Miscellaneous Commercial ServicesCommercial Services Operates Internet telephone based real time education services | Commercial Services |
Meimonkai KK
Meimonkai KK Other Consumer ServicesConsumer Services Operates schools | Consumer Services |
Shingakai Co., Ltd. | |
Riso Welfare KK | |
Inter TOMAS Co., Ltd.
Inter TOMAS Co., Ltd. Miscellaneous Commercial ServicesCommercial Services Provides language education services | Commercial Services |
- Stock Market
- Insiders
- Mitsugu Iwasa
