Fukui, Japan is one of the three largest production regions for optical frames in the world, along with China and Italy. Masunaga Optical premiered the production of eyeglasses in Fukui in 1905. Known for their meticulous craftsmanship, masunaga does not rush the process. With as many as 200 manual processes involved in making an optical frame, you can Rest assured no short cuts were taken in the creation of each masunaga frame.