Tecnisco
2962
Reyuu Japan
9425
Tokyo Board Industries
7815
Fruta Fruta
2586
Yamadai
7426
Founded in 1941 in Tokyo as an optical glass production plant, Hoya is one of the largest eyeglass lens manufacturers in the world. Leveraging its technology know-how in glass manufacturing, Hoya entered the mask blanks business in 1974. Now although its life care business accounts for 67% of its total revenue, almost half of its profit before tax comes from its higher-margin IT business.