| April 1974 | Osamu Sato founded the Japan Optical Technology Research Institute in Kawaguchi City, Saitama Prefecture. |
| June 1978 | The institute was reorganized into a limited company named Nihon Tokushu Kogaku Jushi Co., Ltd. Capital: 3 million yen The head office and plant were relocated to Itabashi-ku, Tokyo. |
| February 1982 | A new plant was established in Shingashi, Itabashi-ku, Tokyo, and the head office was relocated to the same address. |
| July 1984 | Capital was increased to 9 million yen. |
| February 1986 | The Kumagaya Mold Factory, located in Miizugahara, Kumagaya City, Saitama Prefecture, was established. |
| July 1992 | Capital was increased to 10 million yen. |
| May 1997 | A new molding factory was established in Gyoda City, Saitama Prefecture. |
| October 2005 | The Gyoda Factory was relocated and expanded to become the Kumagaya Molding Factory. |
| July 2012 | NTKJ’s research and development plan for “The large mold manufacturing and molding method development” was approved by Japanese government’s “Act on Enhancement of Small and Medium Sized Enterprises’ Core Manufacturing Technology.” |
| July 2012 | NTKJ’s development plan for a “Germanium Fresnel lens” was approved by the local government of Itabashi-ku for the “Act on New Product and Technology development challenge.” |
| October 2012 | Koichi Sato was appointed as the President. The former President Osamu Sato was named as Chairman. |
| April 2013 | NTKJ was granted the “Eco Action 21” Japanese environmental management system’s certificate. |
| May 2013 | NTKJ’s technology development plan was subsidized by the Japanese government’s “act to support small and medium-sized enterprise manufacturers” |
| November 2013 | NTKJ’s Germanium Fresnel lens received the Judges’ Special Award at the Itabashi’s Product and Technology Competition |
| February 2014 | NTKJ’s headquarters were relocated to 2-16-10 Hasune, Itabashi-ku, Tokyo. |
| November 2014 | NTKJ’s elliptical Fresnel lens received an honorable mention at the Itabashi Product and Technology Competition |
