| 1935 |
Tomizo Kohara started an ironworks, Kohara Haguruma Kosho at Nishikicho, Kawaguchi.
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| 1937 |
Developed standardized change gears for lathes. KHK stock gears originate from those change gears.
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| 1947 |
Registered as a joint-stock company, Tomizo Kohara, the president. |
| 1955 |
Made 5-year plan to manufacture standardized metric gears. |
| 1962 |
Built up a sales network in Japan. |
| 1966 |
Deployed large-sized hobbing machines to venture into the large-sized gear market.
Nobuharu Kohara became the president. |
| 1973 |
"KHK" was registered domestically as our trademark.
Started to export our products to the United States and to South Asian countries. |
| 1981 |
Introduced Burroughs B 1900 Computer. |
| 1986 |
Equipped with Carl Zeiss 3-D Coordinate Measuring Machine. |
| 1990 |
Equipped with Gleason's Phoenix 250 HC. |
| 1992 |
Produced an electronic catalog 3005E. |
| 1995 |
Noda factory, separated from Kohara Gear, became an independent entity named KHK Noda Co., Ltd. |
| 1996 |
Achieved certification ISO900l, the first in the Japanese stock gear industry.
Built web site. |
| 1997 |
Celebrated Kohara Gear's 50th anniversary. |
| 1998 |
Nobuharu Kohara, the then president, was awarded a Blue Ribbon Medal for his contribution to the development of gear industry in Japan. |
| 2000 |
Introduced CNC Gear Grinding Machine TAG400. |
| 2001 |
Toshiharu Kohara became the president |
| 2002 |
Created a sales partnership with . |
| 2005 |
Kawaguchi Office/Factory building was completed. |
| 2006 |
HAGURUMA KOBO (KHK's system for the quick modification of KHK stock gears) was registered as our trademark. |
| 2007 |
The extension work of KHK Noda factory building was completed.
Employed Haguruma Boy (Gear Boy) as KHK's advertising character. |
