About Otsuka

Otsuka Pharmaceutical was established in 1964.
At Otsuka Pharmaceutical, we are committed to a holistic approach to health and well-being of people and are striving to create innovative, thoroughly-original pharmaceutical and nutraceutical products based on our corporate philosophy
"Otsuka-people creating new products for better health worldwide".

Message from Top Management

As a total healthcare company
we strive to support the unique potential of each individual

Otsuka-people creating new products for better health worldwide

Otsuka People Talk

Otsuka employees share their stories of continually rising to the challenge

Corporate Profile

Timeline of Otsuka's History

Contact Addresses in Japan

Affiliated Companies Around the World

Production Activities

Original Global Development

Business Collaborators

Corporate Governance

Other Information

Corporate brochure

Download our corporate brochure

(PDF：8.19MB)

Otsuka Virtual Factory Tour (Japanese)

News Releases

Otsuka Pharmaceutical Recognized as a "Food and Nutrition Education Practice Excellent Corporation 2026" by the MAFFLeveraging Proprietary Expertise and Services to Promote Health through Nutrition

Pharmaceuticals

Otsuka Pharmaceutical to Acquire Transcend Therapeutics - Expands Otsuka portfolio in psychiatric and neurological fields and aims to accelerate development of Transcend’s portfolio, including the TSND-201 program for post-traumatic stress disorder (PTSD) -

Pharmaceuticals

Otsuka Submits Application in Japan for Iclusig^® for First-Line Treatment of Philadelphia Chromosome-Positive Acute Lymphoblastic Leukemia