1995-
1965
- Building of the Hamamatsu Plant (currently on lease to the Denko Techno Heat Co., Ltd.) and expansion of the high-frequency induction heat treating business
1966
- Establishment of the Matsuyama sub-branch office (currently the Shikoku office of Chu-Shikoku branch), and the Sendai sub-branch office (currently the Sendai branch).
1967
- Building of the Suzuka Plant (currently on lease to the Denko Techno Heat Co., Ltd.) and expansion of the high-frequency induction heat treating business
[ Automobile ownership in Japan tops 10 million cars ]
[ Over 12 million television subscribers ]
1968
- Building of the Atsugi Plant (currently on lease to the Denko Techno Heat Co., Ltd.) and expansion of the high-frequency induction heat treating business
[ Telephone contracts top 10 million sets ]
1970
- Establishment of the Hiroshima sub-branch office (currently, the Chu-Shikoku branch)
1972
- Building of the Kanuma Plant and the beginning of antenna manufacturing
