About Otsuka
Our Leadership
Our board members and statutory auditors
| Tatsuo Higuchi | Senior Executive Director and Chairman |
|---|---|
| Makoto Inoue | President and Representative Director |
| Yoshiro Matsuo | Executive Deputy President and Representative Director |
| Mikio Bando | Senior Executive Managing Director & Board Member (OIAA* Business) |
| Hiroaki Ono | Senior Executive Managing Director & Board Member (Pharmaceutical Business Group) |
| Akemi Kaneko | Senior Executive Director & Board Member (Quality Control and Quality Assurance) |
| Kiyoshi Taniguchi | Senior Executive Director & Board Member (Production , Supply Chain and CMC) |
| Tsuyoshi Nakamura | Senior Executive Director & Board Member (Finance and Otsuka America, Inc.) |
| Toshiki Sudo | Senior Executive Director & Board Member |
| Ichiro Otsuka | Senior Executive Director & Board Member |
| Tarek Rabah | Senior Executive Director & Board Member |
| John Kraus | Senior Executive Director & Board Member |
| Jeff Boutelle | Senior Executive Director & Board Member |
| Kazuya Inagaki | Standing Audit & Supervisory Board Member |
|---|---|
| Takeo Suzuki | Standing Audit & Supervisory Board Member |
| Atsuo Kouno | Standing Audit & Supervisory Board Member |
| Hiroshi Sugawara | Audit & Supervisory Board Member |
* Otsuka International Asia Arab
As of March 6, 2026
Our corporate officers
| Nobuyuki Kurahashi | Senior Executive Vice President & Operating Officer, Associate General Manager (Pharmaceutical Business Group) | Pharmaceutical Business Group |
|---|---|---|
| Lyo Inuyama | Senior Executive Vice President & Operating Officer, Director (Medical Affairs), PV | |
| Akio Oikawa | Senior Executive Vice President & Operating Officer, General Manager (Pharmaceutical Business Headquarters) | |
| Chikako Usami | Executive Vice President & Operating Officer, Pharmaceutical Business Group Project Coordinator | |
| Takeshi Watanabe | Executive Vice President & Operating Officer, Director (Department of Business Development) | |
| Takayuki Shiratsuchi | Senior Vice President & Operating Officer, Medical Discovery & Development Data Analyst (MD Analyst) | |
| Yoshihisa Yamada | Senior Vice President & Operating Officer, Head of the Tokushima Research Center for Drug Discovery | |
| Masako Shiosakai | Senior Vice President & Operating Officer, General Manager (Headquarters of Clinical Development) | |
| Masanori Kawasaki | Senior Vice President & Operating Officer, Head of the Osaka Research Center for Drug Discovery | |
| Chiaki Sakurai | Senior Executive Vice President & Operating Officer, Associate General Manager (Nutraceutical Business Group), Sales Headquarters, Cosmedics Department and Otsuka Holdings | Nutraceutical Business Group |
| Naoshi Satou | Executive Vice President & Operating Officer, Associate General Manager (Nutraceutical Business Group) and Director (Social Health Relations Department) | |
| Ryousuke Fukase | Executive Vice President & Operating Officer, OIAA Region (China) | |
| Yoshihiro Bando | Executive Vice President & Operating Officer, OIAA Region (Nigeria) | |
| Taro Mikuriya | Executive Vice President & Operating Officer, OIAA Region (Planning) | |
| Koichiro Nitta | Senior Vice President & Operating Officer, Relational Marketing and Director (Sales Support Office) | |
| Hajime Fujita | Senior Vice President & Operating Officer, Seconded to Daiya Foods Inc. | |
| Ryo Harima | Senior Vice President & Operating Officer, Deputy General Manager (Production) and Purchasing | Productions |
| Junichi Jinno | Senior Vice President & Operating Officer, General Manager (CMC) | |
| Tatsuaki Ohashi | Senior Vice President & Operating Officer, General Manager (Diagnostic Group) | Diagnostic Group |
| Kenji Bunya | Senior Executive Vice President & Operating Officer, Director (Human Resources Department), Legal Affairs, Compliance and Otsuka Holdings | Headquarters |
| Naoki Yoda | Executive Vice President & Operating Officer, Director (Department of Business Planning Liaison) and Business Integrity and External Affairs | |
| Junichi Hashimoto | Senior Vice President & Operating Officer, Administration Department | |
| Hiroki Nakayama | Senior Vice President & Operating Officer, Director (Audit Department) and Otsuka Holdings | |
| Masaaki Sobe | Senior Vice President & Operating Officer, Director (Intellectual Property Department) | |
| Masayuki Sato | Senior Vice President & Operating Officer, Director (Portfolio Management Office) and Public Relations | |
| Masanori Udagawa | Senior Vice President & Operating Officer, Director (Business IT Department) and Otsuka Holdings | |
| Aki Sudo | Senior Vice President & Operating Officer, Director (Compliance Department) and Otsuka Holdings | |
| Akihisa Kusumoto | Senior Vice President & Operating Officer, General Manager (Tokushima Headquarters) and Director (Administration Department at Tokushima Headquaters) |
Pharmaceutical Business Group
| Nobuyuki Kurahashi | Senior Executive Vice President & Operating Officer, Associate General Manager (Pharmaceutical Business Group) |
|---|---|
| Lyo Inuyama | Senior Executive Vice President & Operating Officer, Director (Medical Affairs), PV |
| Akio Oikawa | Senior Executive Vice President & Operating Officer, General Manager (Pharmaceutical Business Headquarters) |
| Chikako Usami | Executive Vice President & Operating Officer, Pharmaceutical Business Group Project Coordinator |
| Takeshi Watanabe | Executive Vice President & Operating Officer, Director(Department of Business Development) |
| Takayuki Shiratsuchi | Senior Vice President & Operating Officer, Medical Discovery & Development Data Analyst (MD Analyst) |
| Yoshihisa Yamada | Senior Vice President & Operating Officer, Head of the Tokushima Research Center for Drug Discovery |
| Masako Shiosakai | Senior Vice President & Operating Officer, General Manager (Headquarters of Clinical Development) |
| Masanori Kawasaki | Senior Vice President & Operating Officer, Head of the Osaka Research Center for Drug Discovery |
Nutraceutical Business Group
| Chiaki Sakurai | Senior Executive Vice President & Operating Officer, Associate General Manager (Nutraceutical Business Group), Sales Headquarters, Cosmedics Department and Otsuka Holdings |
|---|---|
| Naoshi Satou | Executive Vice President & Operating Officer, Associate General Manager (Nutraceutical Business Group) and Director (Social Health Relations Department) |
| Ryousuke Fukase | Executive Vice President & Operating Officer, OIAA Region (China) |
| Yoshihiro Bando | Executive Vice President & Operating Officer, OIAA Region (Nigeria) |
| Taro Mikuriya | Executive Vice President & Operating Officer, OIAA Region (Planning) |
| Koichiro Nitta | Senior Vice President & Operating Officer, Relational Marketing and Director (Sales Support Office) |
| Hajime Fujita | Senior Vice President & Operating Officer, Seconded to Daiya Foods Inc. |
Productions
| Ryo Harima | Senior Vice President & Operating Officer, Deputy General Manager (Production) and Purchasing |
|---|---|
| Junichi Jinno | Senior Vice President & Operating Officer, General Manager (CMC) |
Diagnostic Group
| Tatsuaki Ohashi | Senior Vice President & Operating Officer, General Manager (Diagnostic Group) |
|---|
Headquarters
| Kenji Bunya | Senior Executive Vice President & Operating Officer, Director (Human Resources Department), Legal Affairs, Compliance and Otsuka Holdings |
|---|---|
| Naoki Yoda | Executive Vice President & Operating Officer, Director (Department of Business Planning Liaison) and Business Integrity and External Affairs |
| Junichi Hashimoto | Senior Vice President & Operating Officer, Administration Department |
| Hiroki Nakayama | Senior Vice President & Operating Officer, Director (Audit Department) and Otsuka Holdings |
| Masaaki Sobe | Senior Vice President & Operating Officer, Director (Intellectual Property Department) |
| Masayuki Sato | Senior Vice President & Operating Officer, Director (Portfolio Management Office) and Public Relations |
| Masanori Udagawa | Senior Vice President & Operating Officer, Director (Business IT Department) and Otsuka Holdings |
| Aki Sudo | Senior Vice President & Operating Officer, Director (Compliance Department) and Otsuka Holdings |
| Akihisa Kusumoto | Senior Vice President & Operating Officer, General Manager (Tokushima Headquarters) and Director (Administration Department at Tokushima Headquaters) |
As of March 6, 2026