KEIWA Incorporated (4251.T) develops, manufactures and sells high-performance optical films and functional products primarily in Japan. The company offers light diffusion sheets and films for backlight units in liquid crystal displays of smartphones, tablets, laptops and in-vehicle monitors; advanced functional films and sheets for display surface protection, sensors and optical systems in smartphones, in-vehicle products and business monitors; composite diffusion plates; processing papers; industrial packaging materials including corrosion inhibiting paper and film; clean energy materials such as components for solar cells, secondary cells and wind power generators; reflective and gutter sheets for crop growth; construction materials; special films for medical and hygiene usage; building materials; and protective life-extending sheets for roofs and structures. KEIWA operates through Optical Sheets and Functional Products segments, targeting electronics, clean energy, agriculture and construction industries with customers including display manufacturers and industrial users. Founded in 1948 and formerly known as KEIWA Commerce and Industry Co., Ltd. until its name change in 1999, the company is headquartered at 3F Sumitomo Seimei Kayabacho Bldg., 2-10-5 Nihombashi Kayaba-cho, Chuo-ku, Tokyo, Japan, and maintains approximately 419 employees with facilities supporting global market development. In November 2025, KEIWA's board resolved to establish new overseas bases in Vietnam, Germany and the United States to enhance its global network and strengthen its management foundation under the Mid-Term Management Plan for FY2025-FY2028; earlier in FY12/2024, it reported earnings recovery driven by mass production of high-value-added products like the OPASUKI composite diffusion plate and OPALUS light diffusion film amid market rebound and new smartphone model demand.