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

Pharmaceuticals

Sibeprenlimab Phase 3 Data Presented at American Society of Nephrology Kidney Week 2025 Showed Proteinuria Reduction through 12 Months for the Treatment of Immunoglobulin A Nephropathy (IgAN) Trial Interim Analysis Outcomes Published in New England Journal of Medicine

Pharmaceuticals

Otsuka Announces First Participants Enrolled in Phase 3 Clinical Trial Evaluating Investigational Compound Quabodepistat for Drug-resistant Pulmonary Tuberculosis

Pharmaceuticals

Otsuka Signs Joint Research Agreement in Japan with National Cerebral and Cardiovascular Center -Purpose Is to Evaluate Salt Reduction Behavior Change in Heart Disease Patients Using a Nutritional Monitoring App-