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

Business Collaborators

Corporate Governance

Other Information

Corporate brochure

Download our corporate brochure

(PDF：8.19MB)

Otsuka Virtual Factory Tour (Japanese)

News Releases

Pharmaceuticals

Otsuka Presents New Phase 3 Post Hoc Analyses of Centanafadine Highlighting Improvement in Executive Function and Emotional Dysregulation in Adults with ADHD at the 2026 American Society of Clinical Psychopharmacology (ASCP) Annual Meeting

Nutraceuticals

Otsuka Launches New Program FACEDUO "Heat Illness Prevention VR"Enabling Early Awareness and Action Through Simulated Experiences to Help Prevent the Onset and Severity of Heat Illness in Older Adults

Nutraceuticals

Otsuka Launches "Educational Materials and Resources by Otsuka" for Educators to Support Health Education in Schools Providing Free Digital Health Education Materials on Heat Illness Prevention and Nutrition Education