Tsumura & Co.

Tsumura is the clear leader in prescription Kampo formulations. Its defining strength is a domestic share of more than 50%, giving it a near-dominant position, and its ability to develop Kampo combinations of crude drugs into approved medicines prescribed by physicians. It maintains an integrated system from crude-drug procurement and cultivation, including in China, through research, manufacturing, and quality control, with a focus on older adults, cancer supportive care, and women's health. The company is headquartered in Minato City, Tokyo.