| 1943 | July | Founded Nikkodenka Kogyo Corporation as a plating professional = 78 year history of plating!! |
|---|---|---|
| 1954 | April | Developed from the plating business to automotive parts manufacturing business under the name of Okayama Mekki Corporation |
| 1970 | January | Spun off the plating business of Okayama Mekki Corporation as OM Sangyo Co., Ltd., specializing in the plating industry. OM = OKAYAMA MEKKI |
| 1971 | January | Changed the company name from Okayama Mekki Corporation to OM Kogyo Corporation, specializing in the manufacturing of automotive parts. |
| 1972 | October | Started operation centering on plating for automotive parts, general industrial machinery parts, etc. |
| 1973 | February | Spun off the building materials business section from the development department of OM Kogyo Co., Ltd., as OM Kiki Co., Ltd., specializing in the manufacturing and selling of housing-related products. |
| 1984 | September | Newly established a hoop solder plating line: Started plating for electronic parts on a full-scale basis. |
| 1996 | May | Commended by the Okayama Labour Standards Association as an excellent workplace in FY1996. |
| 1997 | November | Received a courtesy certificate from the district director of the Kurashiki Tax Office as an excellent filing corporation. |
| 1999年 | October | Acquired ISO9002 accreditation with specific lines. |
| 2000年 | April | Received subsidy by the Japan Small Business Corporation for "lead-free tin alloy electroplating."(Subsequent subsidy and consignment grant as well as technology development-related information posted on Research & Development page) |
| 2001 | January | Remodeled the first factory to be eco-friendly. |
| 2002 | February | Acquired ISO14001 accreditation. |
| August | Expanded ISO9002 accreditation company-wide. | |
| 2003 | October | Established Asteer Co., Ltd. through management integration of OM Kogyo Corporation, Kyoei Kogyo Co., Ltd., and Shinko Seisakusho Co., Ltd., and started operations. Acquired ISO9001:2000 accreditation. |
| November | Received a courtesy certificate from the district director of the Kurashiki Tax Office as an excellent filing corporation. | |
| 2004 | September | "Whisker-free lead-free solder plating" was certified as "Okayama Wagasha no Waza (our company's technique)". |
| 2005 | August | Plating for magnesium received the "excellence prize at the 1st Monozukuri Nippon Grand Award". |
| 2007 | October | Magnesium plating won the "grand prize in Okayama industry-academia-government collaboration". |
| 2008 | February | Completed the Tochigi Factory as our first business site in another prefecture and an environmentally all-in-one factory. |
| 2009 | April | Selected as one of "1,400 job-creating companies" by the Ministry of Economy, Trade and Industry. |
| 2011 | April | Delivered a donation for the Great East Japan Earthquake to the Sanyo Shimbun. |
| 2013 | April | Opened "OM Sangyo Co., Ltd. Surface Treatment Laboratory" on the 7th floor of the first factory. |
| December | Accepted transfer of the management of Shinsei Co., Ltd., a plating company in Hakusan-shi, Ishikawa. | |
| 2014 | June | Honorary chairman Hiroshi Namba dies (age 100). |
| July | Held a memorial service for remembrance of honorary chairman Hiroshi Namba. | |
| 2015 | August | Founded Siam OKAME Co., Ltd. in the Amata Nakorn Industrial Estate, Thailand. |
| 2016 | June | Completed Siam OKAME Co., Ltd. in the Amata Nakorn Industrial Estate, Thailand. |
| July | Delivered a donation for the Kumamoto Earthquake to the Okayama Chapter of the Japanese Red Cross Society. | |
| September | Received a registration certificate as an employment supporter in Okayama from Okayama Pref. Seto Upper Secondary School for Special Needs Education. | |
| 2017 | February | Received the highest award in FY2016 Okayama City commendations of excellent business operators promoting industrial waste reduction and recycling activities. |
| 2018 | July | Participated in the heavy rain disaster volunteer activities in western Japan (until September). |
| August | Delivered a donation for the heavy rain disaster in western Japan to the Sanyo Shimbun. | |
| 2019 | January | Received an award in FY2018 Okayama City commendations for beautiful town making, comfortable town making. |
| March | Selected by the 2019 Certified Health & Productivity Management Outstanding Organizations Recognition Program (updated every year). | |
| March | Cooperated in Mr. Matthew Barney's exhibition at Okayama Art Summit 2019 (September 27 to November 24). | |
| 2020 | October | Launched TV commercial broadcasts. (RSK Sanyo Broadcasting Co., Ltd.) |
