Mamiya was founded in May 1940 as Mamiya Kōki Seisakusho (Mamiya Optical Works); diversified camera range after 1948; name changed to Mamiya Optical Co. Ltd. in 1950; began producing 35mm cameras in 1957; became Mamiya-OP K.K. in 1993; 2006 transferred camera production to Cosmo Digital Imaging.