http://global.kyocera.com/company/summary/history/until1979.htm

http://www.camerapedia.org/wiki/Yashica

Founded in December 1949 in Nagano, as Yashima Seiki Company. Originally it manufactured components for electric clocks. Later, it began making camera components. By June 1953, it changed the name to Yashima Optical Industry Company Ltd. Later, in 1958 Yashima changed its name to Yashica Company Ltd. In october 1983, it was acquired by giant Kyocera (Kyoto Ceramic Co).