Eisai Corporation
- Country: Japan
- Type: Health
- Website: www.eisai.co.jp
- Update: 05-02
Eisai Corporation (Eisai), a Japanese multinational company specializing in the research and development of pharmaceutical products, was founded in 1941 and is headquartered in Tokyo, with operations in Asia, the Americas, and Europe, and has excelled in the fields of neurology, gastroenterology, and oncology; ranked 1,276th in the 2014 Forbes Global 2000.