KEIWA Incorporated engages in the manufacture and sale of various optical films in Japan, Vietnam, Germany, and the United States. It offers composite diffusion plates, diffusion films, advanced functional films, process films, and agricultural films, as well as processing paper, packaging materials, clean energy materials, and others. The company was formerly known as KEIWA Commerce and Industry Co., Ltd. and changed its name to KEIWA Incorporated in 1999. KEIWA Incorporated was incorporated in 1948 and is headquartered in Tokyo, Japan.