|Months and Years
||Kazuto Mukaiyama establishes Koa Kogyo in Tokyo to start the manufacturing of fixed resistors.
||The company opens Ina plant (at the location of the present head office) in Ina, Nagano to expand its manufacturing capacity.
||The company becomes a joint-stock corporation.
||The company changes its name to Koa Denko Co., Ltd.
||The company becomes a JIS (Japanese Industrial Standards) authorized manufacturer.