SAN 1923 is the original brand of Sanko Kogaku, an eyewear factory founded in 1923.Building on a foundation of technology and expertise cultivated over a century, we pursue the concept of “BUILT ON FUNCTIONS” as envisioned by designer Hirotaka Nakagawa.Structure, function, precision, and finish. A form realized by refining and building upon each essential function, one by one. It is not a beauty born from ornamentation, but an inevitable beauty derived from function. “BUILT ON FUNCTIONS” born from Sanko Kogaku’s accumulated expertise in manufacturing.