Yakuoin Yukiji Temple located in Takao-machi, Hachioji City, Tokyo is one of the three Daihonzan (head) temples of the Chizan school of the Shingon sect in the Kanto region. The main objects of worship are Yakushi Nyorai and Izuna Gongen. The temple is the 5th fudasho-temple of the Kanto 91 Pilgrimage to Yakushi Nyorai, the 8th of the Kanto 36 Sites Sacred to Fudo Myoo and the 68th of the Tama 88 Holy Sites. As many as 2,500 ancient documents are preserved at this temple.

It is said that the temple was founded in 744 by the monk Gyoki under the order of Emperor Shomu. As the statue of Yakushi Nyorai was placed at the foundation, the temple has been called Yakuoin. Later, a priest from Mt. Daigo in Kyoto founded a mountain practice ashram to worship Izuna Gongen, the deity who is believed to be residing in Mt. Iizuna in Nagano Prefecture. In the Edo period, an organization of mountain practitioners named “Takao-kou” was formed. Since then the temple has been the center of Takao Shugendo practice up to the present time.