- Company
- Eisai Co., Ltd
- Date Established
- 06-Dec-41
- Head Office
- 4-6-10 Koishikawa, Bunkyo-ku, Tokyo 112-8088, Japan
- Telephone
- 81-3-3817-3700
- Representatives
-
- Haruo Naito,
Representative Corporate Officer and CEO
- Hideki Hayashi,
Representative Corporate Officer, Japan Business and CIO
- Yasushi Okada,
Representative Corporate Officer, CTO, Industry Affairs and China Business
- Capital
- 44,986 million Yen (as of March 31, 2017)

- Scope of Business
-
- Research and development, manufacture, sale and import and export of pharmaceuticals
- Employees
-
- Consolidated : 10,452
- Non-Consolidated : 3,246 (as of March 31, 2017)
- Production Plants
- Kawashima Plant (Gifu Prefecture)
- Kashima Business Office (Ibaraki Prefecture)
- Eisai Manufacturing Ltd. (U.K.)
- Eisai China Inc. Suzhou Plant (China)
- Eisai (Liaoning) Pharmaceutical Co., Ltd. Benxi Plant (China)
- Eisai Pharmaceuticals India Pvt. Ltd. (India), etc.
- Laboratories
-
- Tsukuba Research Laboratories (Ibaraki Prefecture)
- Kawashima Laboratory (Gifu Prefecture)
- KAN Research Institute, Inc. (Hyogo Prefecture)
- Eisai Inc. Andover Research Institute (U.S.A.)
- Morphotek, Inc. (U.S.A.)
- H3 Biomedicine Inc. (U.S.A.)
- Eisai Ltd. Hatfield Research Institute (U.K.), etc
- Overseas Sales
Offices
-
- Eisai Inc. (U.S.A.)
- Eisai Ltd. (U.K.)
- Eisai GmbH (Germany)
- Eisai S.A.S. (France)
- Eisai China Inc. (China)
- Eisai Korea Inc. (South Korea), etc.