Otsuka

Otsuka (Japanese: 大塚) is a Japanese surname and toponym. The name is formed from the kanji for “large” or “big” and “mound,” and it is commonly found in Japan as both a family name and a place name.

As a place name, Otsuka refers to a neighborhood in Tokyo’s Toshima ward. Otsuka Station on the JR Yamanote Line serves the area and provides access to local transport connections.

Otsuka Pharmaceutical Co., Ltd. is a major Japanese multinational company involved in pharmaceuticals, medical nutrition, and consumer health products. Headquartered in Tokyo, the company operates globally through subsidiaries and partnerships. It is known for consumer beverage brands such as Pocari Sweat and Oronamin C, as well as medicines and health-related products. The Otsuka group has been organized under a holding company structure, with Otsuka Holdings Co., Ltd. overseeing related companies across health, nutrition, and consumer sectors.

In addition to corporate use, Otsuka is a common surname in Japan and is borne by numerous individuals across various professions. The name is also associated with other, less widely known places and institutions in Japan.