HISTORY

NOV '57Founded as koyo juseki Seisakusho in kanagawa, 20 miles south of Tokyo.
OCT '60Yamanashi Plant began operation in Tsuru-city, Yamanashi.
OCT '65Quartz Vibrator Division formed.
AUG '71Company name changed to koyo Precision Co.,Ltd.
JUL '76Fujiyoshida Plant completed.
MAY '82Crystal Oscillator Division began operation.
DEC '84Asumi Plant completed.
SEP '90Asumi Plant equipped with clean-room system and became the
main factory.
OCT '92Main office moved to Koasumi, the current location.
SEP '04Reduction capital to Yen 10 million.
SEP '05Moved the Crystal polish process from Tsuru Factory to Head-quaters
one.
Oct '07Get the certification of ISO9001.