Gekkoso opened in Tokyo in 1917, when 23-year-old Hyozo Hashimoto turned a friendship with poets Tekkan and Akiko Yosano into an art supply shop. Akiko named it Gekkoso, "moonlight house," and its horn logo was designed by the roughly 30 painters and writers who gathered at her salon, meant to call friends together with its sound. That same circle pushed Hyozo toward a harder problem — Japan had no domestically made pigment paint — and after 23 years of experimentation he succeeded, in 1940, with the country's first. The shop survived the WWII bombing of its original Shinjuku store, reopened in Ginza in 1948, and still makes its own paints and brushes by hand three generations later. What we carry are the small objects built from that history: a brass paper clip, a leather pencil cap stamped with the horn logo, a paint-tube pin badge, and a revival of the actual brass button Hyozo wore on his own red jacket.