|1956 (May)||Founded Oriental Terminal Products Co., Ltd. (OTP)
- Started Automotive and Consumer business for Terminals and Connectors -
|1970 (July)||Founded Matsumoto Molding and Engineering Co., Ltd.
- Company before Yuko Sendai Factory, started manufaturing of Plastic lends-barrel for Single lends
reflex camera -
|1972 (January)||Established OTP|
|1976 (January)||Founded Yuko Co., Ltd.
- Started Power supply parts and Consumer business as "Wall plugs blades" -
|1977 (January)||OTP Yokohama Factory start operation|
|1987 (November, 1)||OTP becomes group company of Sumitomo Metal Mining Co., Ltd.|
|1988 (June)||Established SKG Co., Ltd.
- Yuko Co., Ltd. took over Matsumoto Molding and Engineering Co., Ltd. business -
|1990 (March)||Founded Sumix Co., Ltd.
- Started information recording business as " FFC/FPC Connectors for Optical Pick up " -
|1990 (June)||Sumix Co., Ltd. becomes group company of Sumitomo Metal Mining Co., Ltd.|
|1992 (September)||Yuko Co., Ltd. Noshiro factory start operation|
|1994 (October)||Merger 3 companies (OTP, YUKO, Sumix) and establsihed SUMIKO TEC CO., LTD.
- Capital : 410 million yen -
|2003 (January)||Capital increased to 490 million yen|
|2005 (December)||ISO 14001 (2004 Edition) certified at entire domestic site|
|2010 (July)||ISO 9001 (2008 Edition) certified at entire domestic site|
|2016 (August)||Establish SUMIKO TEC (DONGGUAN) CO., LTD.
- Group Company at Dongguan City, Guangdong Province -
|2017 (February)||Headquarter functions relocate to Shin-Yokohama|
|2018 (January)||Establish SUMIKO TEC (THAILAND) CO., LTD.
- Group Company at Bangkok, Thailand -
|2018 (July)||ISO 9001/14001 (2015 Edition) certified at entire domestic site|
|2020 (February)||IATF16949 certified at Noshiro Factory|
|2022 (March)||IATF16949 certified at Sendai Factory|
|2022 (November)||Established Minebea Connect Inc.|
|2023 (April)||Head office relocated to Tama City, Tokyo|