History
History
| December 1948 | Established Jonan Parkerizing Factory Co. |
|---|---|
| June 1956 | Merged with Kawasaki Parkerizing Plant of Toyo Reiki Kaisha, Ltd. and changed the company name to Keihin Parkerizing. |
| March 1959 | Ltd. and Ebara Plant, and changed the company name to Parker Processing Co. |
| May 1971 | Chiba Plant established. Nov. Merged with Kansai Parker Processing Co. |
| August 1972 | Hamamatsu Plant established. |
| July 1981 | Established Kikukawa Plant (wholly owned subsidiary) of Tokai Parkerizing Co. |
| May 1982 | Kawasaki Plant was relocated and newly established. |
| October 1985 | Kawagoe Plant established. |
| April 1990 | Toyohashi Plant established. |
| March 1998 | Oita Parkerizing Co., Ltd. established as a wholly owned subsidiary.Toyohashi Plant established. |
| November 2000 | Parker Processing Vietnum Co., Ltd. was established as a wholly owned subsidiary. |
| August 2001 | Relocated and newly established Kikugawa Plant of Tokai Parkerizing Co. and renamed it Shizuoka Plant. |
| October 2005 | Merged Kyoto Parkerizing Co., Ltd. and Osaka Parkerizing Co., Ltd. and renamed Kyoto Plant, Kisshoin Plant, Hanshin Plant, and Hokuriku Plant.Ltd. and the Komatsu Plant of Kyoto Parkerizing Co. |
| April 2006 | Kyoto Parkerizing Komatsu Plant renamed Komatsu Parkerizing Co. |
| April 2007 | Merged with Tokai Parkerizing Co., Ltd. and changed its name to ParkerProcessing Co. |
| May 2007 | Moved the head office to 1-15-1 Nihonbashi, Chuo-ku, Tokyo. |
| May 2012 | Kyoto Plant and Kichijo-in Plant are integrated. |
| April 2016 | Furuichi Plant and Kadoma Plant are integrated. |
| March 2020 | New factory building added at the Aki Plant（Oita Parkerizing Co.）. |
| July 2020 | Hokuriku Plant adds new factory building. |
