Fukui, Japan is one of the three largest production regions for optical frames in the world, along with China and Italy. 97% of Japanese-made optical frames are manufactured in Fukui. Masunaga Optical premiered the production of eyeglasses in Fukui in 1905. The company founder Gozaemon Masunaga brought in skilled craftsmen from Osaka and Tokyo with the ambition of setting the optical industry solidly in place in Fukui.