Meiji Seika Pharma Co., Ltd. , formerly Meiji Seika Kaisha, Ltd. is a Japanese pharmaceutical company. It is currently a subsidiary of Meiji Holdings and a Japanese leader in the area of infectious disease with 18% market share. It markets treatments for depression, obsessive-compulsive disorder, vaccines, and allergy drugs. Meiji Pharma is doing research in generic anticancer drugs and biosimilars with partner organisations.