Established in 1931 and headquartered in Tokyo, Japan, Asahi Kasei operates in three business sectors that are: Material - including chemicals, fibres and electronic businesses; Health care - consisting of pharmaceuticals, medical devices and acute critical care businesses; Homes - including construction and material businesses. Their pharmaceuticals business provides a range of diagnostic reagents. Asahi Kasei develops, distributes and manufactures pharmaceutical grade, high-quality excipients. Ceolus a microcrystalline cellulose is an example of a widely used pharmaceutical excipient that is developed by the company's particle design technology.