Originally Posted by barondla 
Rep told me that Hoya is owned by one brother, and Kenko the other brother. His boss has played golf with them. Not sure which, if either company owns Tokina.
thanks
barondla
Kenko and Tokina (ans Slik and Fujimoto medical imaging?)are one in the same company now.
JAPAN PHOTO AND VIDEO ACCESSORY ASSOCIATION Translation result for http://www.kenko-tokina.co.jp/
Technically Hoya is a public company and "owned" by it's shareholders.