| 1941. | 2 | The Okasue Furniture Factory is founded. |
| 1945. | 3 | Because of war damage, the factory is relocated to Tobikoshi, Takaoka-cho, Hekikai-gun |
| 1950. | 10 | The business name is changed to the OK Woodworking Okada Furniture Shop, and the store is moved to Obayashi, Takaoka. |
| 1953. | 7 | A new furniture manufacturing plant is built. |
| 1957. | 3 | An exclusive relationship with Toyota Motor Corp. is started. |
| 1959. | 2 | Okada Woodworking, Ltd. established as a corporation. (Capital: 600,000 yen) |
| 1965. | 11 | A new plant is built in Ekaku-Shinmachi, Toyota, and the company is moved there. |
| 1969. | 6 | Capitalization increased (Capital: 4.8 million yen) |
| 1973. | 12 | The company name is changed to Okada Woodworking Co., Ltd. (Capital: 11 million yen) |
| 1978. | 8 | Capitalization increased (Capital: 22 million yen) |
| 1979. | 11 | The Shiga Plant is built and starts operation in Hirao, Aito-cho, Echi-gun, Shiga Prefecture |
| 1987. | 7 | The Founder and Representative Director of the company, Suekichi Okada,retires and becomes an Senior Advisor. Yoshimitsu Okada becomes the President. |
| 1988. | 1 | The company name is changed to Okata Industry Co., Ltd. (Capital: 44 million yen) |
| 1992. | 12 | Kamigo Plant 1 is built and starts operation. |
| 1994. | 6 | The new Head Office Plant is built and starts operation. |
| 2000. | 11 | Kamigo Plant 2 is built and starts operation. |
| 2004. | 3 | The Head Office Plant obtains ISO 14001 certification. |
| 2005. | 6 | The Kyushu Plant starts operations. |
| 2005. | 10 | The Norisada Plant is built and starts operations. |
| 2015. | 8 | Plant 2 at head offce is rebuilt. |
| 2017. | 11 | Yoshimitsu Okada becomes President. Tetsushi Okada assumed Managing Director. |
| 2018. | 1 | Noritada painting plant is built and strats operation. |