| 1957 |
Kenko Co.,Ltd. was founded. |
| 1969 |
The construction of the headquarter building in Nerima-ku was completed. |
| 1974 |
Kenko Optical Co., Ltd. was founded as an affiliate for the purpose of manufacturing optical products. |
| 1980 |
The Product Center was completed and opened in Miyoshi-cho, Saitama Prefecture. |
| 1981 |
The company's capital increased to 50 million yen. |
| 1989 |
Kenko Philippine Corporation was established in Mactan. |
| 1989 |
Koei Seiki Co., Ltd. was acquired as an affiliate. |
| 1992 |
The company's capital increased to 100 million yen. |
| 1993 |
Kenko invested capital in T.H.K. Photo Products Inc. (USA). |
| 1997 |
The head office was relocated in Shinjuku-ku, Tokyo. |
| 1997 |
Asiaoptical Co., Ltd. was acquired as an affiliate. |
| 1998 |
TASCO JAPAN Co. was acquired as an affiliate. |
| 2000 |
Philippines Sakurai Plastic was acquired as an affiliate. |
| 2001 |
SLIK Corporation was acquired as an affiliate. |
| 2002 |
The Product Center was relocated to Hidaka-shi, Saitama Prefecture due to business expansion. |
| 2005 |
Shanghai KTS Co., Ltd. was founded. |
| 2006 |
Kenko Professional Imaging Co., Ltd. was founded. |
| 2007 |
ASKA was acquired as an affiliate. |
| 2008 |
Fujimoto Photo Industrial was acquired as an affiliate. |
| 2011 |
Kenko merged with Tokina. The company name was changed to Kenko Tokina Co., Ltd. |
| 2011 |
Cokin was acquired as a subsidiary. |
| 2014 |
The company's capital increased to 130 million yen. |
| 2014 |
The head office was relocated in Nakano-ku, Tokyo. |
| 2014 |
Formatt was acquired as a subsidiary. |
