Asahi Kasei Corporation At the Asahi Kasei Group, we have proactively diversified our operations since the 1950s, expanding and growing in line with the Japanese economy. Having been primarily a fibers company, we grew over the years while constantly transforming our business portfolio to meet the changing needs of the times. We are now a leading diversified manufacturer with operations in the four business sectors of Chemicals & Fibers, Housing & Construction Materials, Electronics, and Health Care.