Where is Eisai based?

Written by Editorial Team | Last Updated: August 2026

Eisai Co., Ltd., a major Japanese multinational pharmaceutical and research company, has its global corporate headquarters based in Tokyo, Japan. The primary headquarters is located in the Bunkyo ward of Tokyo, housing executive leadership, advanced medical research laboratories, and administrative operations. In addition to its main Japanese base, Eisai operates a widespread network of research centers, development facilities, and regional offices located across North America, Europe, and Asia.

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