1969/ 7 OHTSUKI SEIKO CO., LTD. was established by Nakamura Shouji in Ohtsuki-city
as manufacturer of precision gear and micro geared-motor for controller.
1970/ 8 Commenced manufacturing oil pump check valves and other functional parts for motor cycle engines.
1972/ 1 Upon completion of the main factory the integrated production of various parts and gear heads was strengthened by high precision processing of automatic lathe and gear hobbing. Commenced manufacturing parts for gas equipments.
1974/10 Commenced manufacturing for camera drive units.
1987/ 5 Established TAIWAN OHTSUKI PRECISION CO., LTD. in Taoyuan-county, Taiwan as the spearhead of overseas production. commenced production of the various parts. metal gear and gear heads.
1989/11 Established TAIWAN OHTSUKI SEIKO (KAOHSIUNG) CO.,LTD. in Taiwan to expand production reinforced precision gear department.
1992/11 Established OHTSUKI SEIKO (MALAYSIA) SDN.BHD. factory in Kuala-Lumpur Malaysia to commenced manufacturing of precision lathe parts and gear hobbing parts.
1995/ 3 OHTSUKI SEIKO (MALAYSIA) SDN.BHD. factory move to expand production and commenced gear head assembly for camera and FDD.
1997/ 4 OHTSUKI SEIKO (HK) CO., LTD. established in Hong Kong and is preparing to manufacture Chan-an, Dong Guan-city Guang Dong, China.
1998/ 1 Obtain "Chuusho Souzouho" enterprise authorization for new type of gear head accompany research and development.
1998/ 7 Completed OHTSUKI SEIKO (CHANG-AN) FACTORY commenced manufacturing of precision auto lathe parts and metal gears.
2000/ 3 Completed head office new building, start up production of valves CPL for ABS, to enhance facilities
2000/ 8 Commenced manufacturing for GearHead in OHTSUKI SEIKO (CHANG-AN) FACTORY.
2001/ 7 Integrating 2 domestic subsidiaries into the Second Factory of OHTSUKI SEIKO CO.,LTD.
2002/ 5 Established OHTSUKI SEIKO (SUZHOU) CO., LTD. in Suzhou New District China.
2003/ 4 Completed OHTSUKI SEIKO (SUZHOU) FACTORY commenced manufacturing of precision auto lathe parts and metal gears.
2003/10 Completed OHTSUKI SEIKO (MALAYSIA) SDN.BHD. in Selangor State, Malaysia commenced manufacturing of precision auto lathe parts and metal gears.
2007/ 5 Ministry of Economy, Trade and Industry of Japan has selected OHTSUKI SEIKO CO., LTD. to be a part of Top 300 Small and Medium-sized Enterprises.
2007/ 6 Established OHTSUKI SEIKO THAILAND CO., LTD. in Amata Nakorn Industrial Estate, Thailand.
2008/ 4 Completed OHTSUKI SEIKO THAILAND CO., LTD. FACTORY commenced manufacturing of precision auto lathe parts and metal gears.
2009/ 9 Starting the developing project of the CNC 7-axis high-speed hobbing machine, with the approval of the R&D in ultra-high-speed gear cutting researchh from the gManufacturing SME product development support of The Ministry of Economy, Trade and Industry
2011/ 8 Setting up the OTSUKI SEIKO (DONGGAN) CO., LTD with the incorporation of
the Otsuki Seiko Changan Factory in Guangdong Province of China.
2011/10 Okaya plant established in Okaya-shi, Nagano prefecture for production facilities
2016/ 6 Taiwan Moved factory to Taoyuan Yangmei to expand production of OHTSUKI SEIKO (CHUNGLI) co.,ltd.