| Date |
|
| July 7, 1977 |
Founded the company as Kohsei by current President Mitsutoyo Komatani |
| April 1, 1979 |
Reorganized into a joint-stock company |
| September 1, 1996 |
Established a subsidiary, Philippine Kohsei Corporation (PKC), in the Philippines |
| March 28, 1997 |
Increased the capital to 102.5 million yen |
| February 1, 2000 |
Completed the construction of the Kitakyushu Plant (present Kitakyushu Plant) |
| August 13, 2001 |
Moved the headquarters (to Kohsei Bldg., 2-11, Nihonbashi Kobuna cho, Chuo-ku, Tokyo) |
| November 1, 2002 |
Opened the Hikari Satellite Office (within the Hikari Works of Nippon Steel & Sumikin Stainless Steel Corporation) |
| March, 2006 |
Completion of the Second Kitakyushu Plant |
| December, 2007 |
Established a subsidiary, Kohsei Multipack Vietnam Co.,Ltd, in Vietnam |
| December, 2008 |
Completion of the Kohsei Multipack Vietnam Plant |
| March 9, 2020 |
Moved the headquarters (to Higuchihonten Bldg. 2F, 1-12-2 Nihonbashi Kayaba cho, Chuo-Ku,Tokyo) |
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