![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: 2 M $ as of 31/05/2026
Profile
Masatsune Okajima currently works at StemRIM, Inc., as President, CEO & Representative Director from 2023.
Mr. Okajima also formerly worked at MediciNova, Inc., as Vice President & Head-Japanese Office from 2006 to 2019, Daiwa Securities SMBC Co. Ltd., as Deputy General Manager from 2002 to 2009, Daiwa Securities SB Capital Markets Co. Ltd., as Manager from 1999 to 2002, and Sumitomo Capital Securities Co., Ltd., as Manager from 1996 to 1999.
Mr. Okajima 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% ) | 2 M $ | 31/05/2026 |
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 |
Training of Masatsune Okajima
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
79
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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