Saishō-ji Temple, Buddhist temple in Edogawa-ku, Japan.

Saishō-ji is a Tendai-sect temple in Hirai, Edogawa-ku, officially named Go-hōzan Myōō-in Saishō-ji. Its main hall has a steep grey tiled roof on a pale wooden frame with bracket complexes under the eaves, gold ornaments at the ridge ends, dark slatted wood bays and a plaque with three gold characters. A stone lantern stands at the right of the facade, and the entrance is marked by two gate pillars with red slatted cabinets and grey tiled roofs.

According to temple tradition, Saishō-ji was founded in 860 by Ennin (Jikaku Daishi) on the banks of the Sumida River and opened in 877 by his disciple Ryōhon. In the early Meiji period, the Dainichi Nyorai statue from Ushijima Shrine, where the temple had served as bettō-ji, was transferred here after the separation of Shinto and Buddhism. In 1912, the temple moved from its original site to Hirai due to land readjustment for the Komagata Bridge.

The temple is commonly known as Mekuro Fudō-son, one of the Edo Five-Colour Fudō sites, and is the 19th stop on the Kantō Thirty-Six Fudō pilgrimage. Its main image is a seated wooden Fudō Myōō, an Edogawa ward registered cultural property since 13 January 1981; his right eye is wide open to reject evil, the half-closed left eye shows compassion. Visitors may view it by asking the resident priest.

The temple is about 14 minutes on foot (1.1 km) from the south exit of Hirai Station on the JR Sobu Line, or 16 minutes (1.3 km) from the Oshima exit of Higashi-Ojima Station on the Toei Shinjuku Line. Several Toei buses stop at Komatsugawa Kumin-kan-mae, an 8-minute walk (about 575 m) away. The Fudo Myoo statue can be viewed by asking the resident priest.

The temple's Fudō Myōō statue, a wooden seated figure, is a registered tangible cultural property of Edogawa Ward, designated on 13 January 1981. Its right eye is wide open to reject evil, while the half-closed left eye expresses compassion. Visitors may view it by asking the resident priest.