Masunaga | K3 is a collaboration between Masunaga, a leading Japanese eyewear manufacturer and Kenzo Takada, world renowned Japanese designer. Masunaga Optical was the founder of the optical industry in Fukui, Japan in 1905. Masunaga produces eyewear that requires more than 200 steps to complete, using only the finest materials such as beautiful hand-polished acetate, durable seven-barrel hinges, distinctive silver rivets and pure titanium. Masunaga is the only company in Japan that has a factory in charge of all processes from raw materials to production.