|May, 1950||Established Tokyo Optical Equipment Manufacturing (Shinjuku, Tokyo)|
||Changed the company name to Tokina Optical Co.Ltd.
||Established EYEMEC Co., Ltd. (Capital:10 million yen), a sales company for contact lenses manufactured by HOYA Corp.|
||Increased capital to 40 million yen.|
||Changed the company name to Tokina Co.Ltd., which succeeded operations of the former Tokina Optical Co., Ltd. (established in 1950; capital of 450 million yen)
||Increased capital to 90 million yen.|
||Commissoned by Kenko Co., Ltd. to succeeded operations of its overseas interchangeable lens sales division.
Closed Tokina China office in Changchun city, Jilin province, China and established a subsidiary company named Changchun Tokina Optical Equipment Co., Ltd.
Started to manufacture monitoring and industrial lenses.
||Changchun Tokina Optical Equipment Co., Ltd. took over the Changchun T.M.A Optical Co., Ltd.
The business of KT Sakurai Corp. Optics Division was transferred to Kenko Tokina Slik(KTS) Corp.
The business of Zhongshan Kenko Precision Machinery Co., Ltd. was transferred to Zhongshan kenko Tokina Precision Machinery Co., Ltd.
||The head office was transferred from Machida-shi, Tokyo to Miyoshi-machi, Iruma-gun, Saitama.|
||The sales business of surveillance equipment was transferred from TSS Co., Ltd. Security Department to Tokina Co., Ltd.|
|Sep, 2008||The San Engineering Co., Ltd. joined with Tokina Co., Ltd. as the Fukaya factory.|
Tokina Co., Ltd. was merged into her mother company, Kenko Co., Ltd. and the new consolidated company was denominated as “Kenko-Tokina Co., Ltd."