![Yosuke Matsushima](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>)
Yosuke Matsushima
Chairman at
JMDC INC.
Net worth: 29 M $ as of 2026-05-30
Profile
Yosuke Matsushima is Chairman at JMDC, Inc. since 2023.
Director at Doctor Net KK since 2015.
Director at Cable Networks Akita KK since 2013.
Non-Executive Director at Medical Database Co., Ltd. since 2018.
Independent Outside Director at Karadanote, Inc. since 2023.
Former Senior Director at Marunouchi Capital Co., Ltd. from 2008 to 2012.
Representative Director at NK Relations Godokaisha from 2012 to 2016.
Director at Japan Regenerative Medicine Co., Ltd. from 2014 to 2022.
Chief Operating Officer & Vice President at Noritsu Koki Co., Ltd. in 2013.
Director at Unike Software Research Co., Ltd., Teibow Co., Ltd., Kidswell Bio Corp., Ikiiki Co., Ltd., NK Works Co., Ltd., Halmek Alpha Co., Ltd., FEED Corp., NS Partners Co. Ltd., GeneTech, Inc., Nihon Kyosai Co., Ltd. Director at Ai-Medic Co., Ltd. and PKSHA Technology, Inc. as Outside Director.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
Halmek Holdings Co., Ltd.
 Halmek Holdings Co., Ltd. Internet Software/ServicesTechnology Services Provides content publishing, mail order, advertising and healthcare services & operates clothing, footwear, cosmetics and food supplements stores 17.2% | 2025-09-29 | 1,900,000 ( 17.2% ) | 19 M $ | 2026-05-30 |
JMDC INC. 0.86% | 2025-09-29 | 565,000 ( 0.86% ) | 10 M $ | 2026-05-30 |
Sapeet, Inc.
 Sapeet, Inc. Information Technology ServicesTechnology Services Develops AI consulting and three dimensional algorithm 0.94% | 2025-09-29 | 15,400 ( 0.94% ) | 236 142 $ | 2026-05-30 |
Yosuke Matsushima active positions
| Companies | Position | Start |
|---|---|---|
| JMDC INC. | Chairman | 2023-05-31 |
| KARADANOTE, INC. | Director/Board Member | 2023-09-30 |
Medical Database Co., Ltd. | Director/Board Member | 2018-05-31 |
Doctor Net KK
 Doctor Net KK Medical/Nursing ServicesHealth Services Provides remote medical support services and information technology solution services | Director/Board Member | 2015-06-30 |
Cable Networks Akita KK
 Cable Networks Akita KK Cable/Satellite TVConsumer Services Provides cable television programming services | Director/Board Member | 2013-04-30 |
Former positions of Yosuke Matsushima
| Companies | Position | End |
|---|---|---|
Japan Regenerative Medicine Co., Ltd.
 Japan Regenerative Medicine Co., Ltd. Pharmaceuticals: OtherHealth Technology Engages in research and development of regenerative medicine and cell technology products | Director/Board Member | 2022-08-03 |
Marunouchi Capital Co., Ltd.
 Marunouchi Capital Co., Ltd. Investment ManagersFinance Marunouchi Capital is an active manager which provides financing for buyout transactions such as LBO. The firm targets companies operating in consumer services, retail, and manufacturing sector. It focuses on companies located in Japan. | Director/Board Member | 2012-10-31 |
NK Relations Godokaisha
 NK Relations Godokaisha Financial ConglomeratesFinance Operates as an investment holding company | Director/Board Member | 2016-05-31 |
Ikiiki Co., Ltd.
 Ikiiki Co., Ltd. Publishing: Books/MagazinesConsumer Services Publishes magazines | Director/Board Member | - |
| ░░░░░░░░░░░░░ ░░░░ ░░░░ | ░░░░░░░░░░░░░░ ░░░░░░ | - |
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
28
1st degree connections
21
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 21 |
|---|---|
Noritsu Koki Co., Ltd.
 Noritsu Koki Co., Ltd. Telecommunications EquipmentElectronic Technology Manufactures and sells photofinishing equipment and relate peripheral equipment | Electronic Technology |
Unike Software Research Co., Ltd.
 Unike Software Research Co., Ltd. Information Technology ServicesTechnology Services Develops information systems and solutions for the healthcare industry | Technology Services |
JMDC, Inc.
 JMDC, Inc. Data Processing ServicesTechnology Services Provides medical statistics data services through online | Technology Services |
Teibow Co., Ltd.
 Teibow Co., Ltd. Office Equipment/SuppliesProducer Manufacturing Manufactures and sells marker pen nibs | Producer Manufacturing |
Kidswell Bio Corp.
 Kidswell Bio Corp. BiotechnologyHealth Technology Identifies and accumulates disease-causing genes | Health Technology |
Marunouchi Capital Co., Ltd.
Marunouchi Capital Co., Ltd. Investment ManagersFinance Marunouchi Capital is an active manager which provides financing for buyout transactions such as LBO. The firm targets companies operating in consumer services, retail, and manufacturing sector. It focuses on companies located in Japan. | Finance |
Ikiiki Co., Ltd.
Ikiiki Co., Ltd. Publishing: Books/MagazinesConsumer Services Publishes magazines | Consumer Services |
Doctor Net KK
Doctor Net KK Medical/Nursing ServicesHealth Services Provides remote medical support services and information technology solution services | Health Services |
NK Works Co., Ltd.
 NK Works Co., Ltd. Wholesale DistributorsDistribution Services Distributes industrial machinery and tools | Distribution Services |
Cable Networks Akita KK
Cable Networks Akita KK Cable/Satellite TVConsumer Services Provides cable television programming services | Consumer Services |
Zenkokutsuhan Co., Ltd.
 Zenkokutsuhan Co., Ltd. Information Technology ServicesTechnology Services Operates an e-commerce site | Technology Services |
Ai-Medic Co., Ltd.
 Ai-Medic Co., Ltd. Medical SpecialtiesHealth Technology Manufactures, distributes, and maintains medical equipment | Health Technology |
FEED Corp.
 FEED Corp. Medical DistributorsDistribution Services Distributes medical and dental equipment and supplies | Distribution Services |
NK Relations Godokaisha
NK Relations Godokaisha Financial ConglomeratesFinance Operates as an investment holding company | Finance |
NS Partners Co. Ltd.
 NS Partners Co. Ltd. Miscellaneous Commercial ServicesCommercial Services Engages in medical fee factoring and consulting business | Commercial Services |
GeneTech, Inc.
 GeneTech, Inc. Medical/Nursing ServicesHealth Services Provides fetal DNA testing and clinical services | Health Services |
PKSHA Technology, Inc.
 PKSHA Technology, Inc. Packaged SoftwareTechnology Services Develops software for data analysis solutions that helps to support businesses | Technology Services |
Nihon Kyosai Co., Ltd.
 Nihon Kyosai Co., Ltd. Property/Casualty InsuranceFinance Provides rental housing insurance services | Finance |
Japan Regenerative Medicine Co., Ltd.
Japan Regenerative Medicine Co., Ltd. Pharmaceuticals: OtherHealth Technology Engages in research and development of regenerative medicine and cell technology products | Health Technology |
Medical Database Co., Ltd. | |
Karadanote, Inc.
 Karadanote, Inc. Miscellaneous Commercial ServicesCommercial Services Provides digital marketing and applications development services | Commercial Services |
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