|1970||established as a corporation "Hadaseiko".
started to operate as a subcontract factory under exclusive contract with Hitachi Metals Ltd. Yasugi factory. Have 17 employees.
|1972||awarded a prize of technical skills from Hitachi Metals Ltd.|
|1978||award a prize of progress from labor standards bureau of Shimane.|
|1981||award a prize of hygiene from labor standards bureau of Shimane.|
|1986||changed the name to "Hadaseikou Ltd." Capital 10000000yen.
increase capital to 15000000yen.
|1988||complete of the first plant.|
|1996||complete of the second plant.|
|2002||complete of the third plant.|
|2007||approval of new plan of management.|