In 1998, Maison Hermès asked RPBW to design its Japanese headquarters in Tokyo. Harumi-dori is chosen, the main street of the Ginza district. The site has atypical development: a long and tight lot that forces the building to grow above all in height. The result is a 15-storey building (of which 3 basements), 45 meters long and 11 meters wide. The lining element consists of a single 45 cm square meter module repeated for 13,000 times. The size of each module corresponds to a molten glass drop: a measure determined physically by the surface tension of the material.