San'en-zan Zōjō-ji is a Jōdo-shū Buddhist temple in Tokyo, Japan. It is the main temple of the Jōdo-shū Chinzei sect of Buddhism in the Kantō region.
Zōjō-ji is notable for its relationship with the Tokugawa clan, the rulers of Japan during the Edo period, with six of the Tokugawa shōguns being buried in the Taitoku-in Mausoleum in the temple grounds. Also, the temple's Sangadetsumon is the oldest wooden building in Tokyo, dating from 1622. The original buildings, temples, mausoleums and the cathedral were destroyed by fire, natural disasters or air raids during World War II.
It is located in the Shiba neighborhood of Minato. The Shiba Park is built around the temple, with the Tokyo Tower standing beside it. In 2015 a Treasure Gallery was opened on the underground level of the Daiden, and it currently houses paintings of Kanō Kazunobu and a model of the Taitoku-in Mausoleum.