Tsuen Tea (通圓, Tsūen) is the oldest tea house in Japan, founded in 1160 in Uji city, Kyoto Prefecture, Japan. It is also the 13th oldest company in Japan, and the 30th oldest in the world, appearing on the List of oldest companies. Located across from Uji Station on the Keihan Uji line, just east of Uji Bridge (originally constructed in 646), successive generations of Tsuen owners provided tea to travelers as "bridge guardians." The shop is the subject of a Kyōgen farce called "Tsuen" and also appears in Eiji Yoshikawa's epic novel Musashi.

Tsuen Main Branch