![Masatsune Okajima](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>)
Masatsune Okajima
Chief Executive Officer at
STEMRIM
Net worth: 1 M $ as of 30/09/2026
Profile
Mr. Masatsune Okajima is a President, CEO & Representative Director at StemRIM, Inc. He is on the Board of Directors at StemRIM, Inc. Mr. Okajima was previously employed as a Vice President & Head-Japanese Office by MediciNova, Inc., a Deputy General Manager by Daiwa Securities SMBC Co. Ltd., a Manager by Daiwa Securities SB Capital Markets Co. Ltd., and a Manager by Sumitomo Capital Securities Co. Ltd. He received his undergraduate degree from the University of Tokyo.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
STEMRIM INC. 1.74% | 31/01/2026 | 1,088,000 ( 1.74% ) | 1 M $ | 30/09/2026 |
Masatsune Okajima active positions
| Companies | Position | Start |
|---|---|---|
| STEMRIM | Chief Executive Officer | 25/10/2023 |
Former positions of Masatsune Okajima
| Companies | Position | End |
|---|---|---|
| MEDICINOVA, INC. | Corporate Officer/Principal | 14/03/2019 |
Daiwa Securities SMBC Co. Ltd.
 Daiwa Securities SMBC Co. Ltd. Investment Banks/BrokersFinance Trades and brokers securities; operates private equity funds | Corporate Officer/Principal | 31/12/2009 |
Daiwa Securities SB Capital Markets Co. Ltd.
 Daiwa Securities SB Capital Markets Co. Ltd. Investment ManagersFinance Provides asset management services | Corporate Officer/Principal | 01/01/2002 |
Sumitomo Capital Securities Co., Ltd.
 Sumitomo Capital Securities Co., Ltd. Investment Banks/BrokersFinance Provides financial security services | Corporate Officer/Principal | 01/01/1999 |
Education of Masatsune Okajima
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
81
1st degree connections
6
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 6 |
|---|---|
MediciNova, Inc.
 MediciNova, Inc. Pharmaceuticals: MajorHealth Technology Operates as biopharmaceutical company, which develops novel therapeutics for the treatment of neurological and other disorders | Health Technology |
Daiwa Securities SMBC Co. Ltd.
Daiwa Securities SMBC Co. Ltd. Investment Banks/BrokersFinance Trades and brokers securities; operates private equity funds | Finance |
Daiwa Securities SB Capital Markets Co. Ltd.
Daiwa Securities SB Capital Markets Co. Ltd. Investment ManagersFinance Provides asset management services | Finance |
University of Tokyo
 University of Tokyo Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Sumitomo Capital Securities Co., Ltd.
Sumitomo Capital Securities Co., Ltd. Investment Banks/BrokersFinance Provides financial security services | Finance |
StemRIM, Inc.
 StemRIM, Inc. Miscellaneous Commercial ServicesCommercial Services Engages in research and development of regenerative drugs | Commercial Services |
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