Zuigan-ji, Buddhist temple in Himeji, Japan

Zuigan-ji is a Tendai Buddhist temple on the slope of Mount Masui in northern Himeji, founded as Masui-dera by Prince Shōtoku and converted to the Tendai school in 834. Its main hall, rebuilt in 1666 by Himeji domain lord Sakakibara Tadatsugu, has a ceiling painting by Kanō Tan'yū. The precinct also holds a founder's hall, a sutra hall, a bell tower and a Tang gate, five of them Important Cultural Properties.

According to the temple chronicle Shūki (1302), Prince Shōtoku founded the predecessor temple, Masui-ji, through the monk Eben, and Gyōki later revived it. In 834 it became a Tendai temple by order of Emperor Ninmyō and received the name Zuigan-ji in 849. The monk Dōzui (?–1157) was a noted scholar. In 1573 Bessho Nagaharu of Miki attacked and burned the whole mountain; the temple was rebuilt on the old site in 1586.

Zuigan-ji is the 4th stop on the Harima Saigoku 33 Kannon pilgrimage and the 15th on the Banshu Yakushi pilgrimage; pilgrims recite its goeika verses, one praising the healing vow of the Buddha of Mount Masui. Monthly rites include a Goma fire offering for Fudō Myōō on the 28th in the Nembutsu hall and a Goma for Jissō-in on the 6th.

The temple lies in the hills southwest of Mount Masui, north of central Himeji. From the Shinkibasu "Shirakuni" stop it is about 350 m north on foot, then roughly 800 m of climbing to the main hall; from JR Bantan Line Nozato Station it is about 13 minutes on foot. By road, turn north at the Zuiganji-iriguchi intersection off Hyogo Route 518.

In August 2014, a memorial stupa bearing the monk name Zōkei, belonging to Kodera Kyūmu, was found on the site of the Jizō-in subtemple within the grounds. The temple also keeps the graves of Himeji lords Sakakibara Tadatsugu and Sakakibara Masakuni, and a memorial tower for Ikeda Terumasa.