Ricoh Company, Ltd., was established in 1936 as Riken Kankoshi Co., Ltd. to manufacture and market diazo positive sensitized paper.
Feb. 6, 1936
Riken Kankoshi Co., Ltd., is formed to make and market sensitized paper.(until 1938)
Kiyoshi Ichimura appointed executive managing director. (until Jan. 11, 1946)
Mar. 1938
Name changed to Riken Optical Co., Ltd. and starts production of optical devices and equipment. (until 1963)
