Masunaga is a Japanese eyewear brand based in Fukui, one of the world’s key centres for optical frame production, where the company first began crafting eyeglasses in 1905. Built on a tradition of skilled craftsmanship, the brand continues to produce frames through a fully integrated in-house process, from raw materials to final finish. Each stage, including the creation of custom molds for new designs, is handled internally, allowing for exceptional control over detail and quality in every frame.