Ōya-ji (大谷寺) is a Buddhist temple of the Tendai sect in the city of Utsunomiya, Tochigi Prefecture, in northern Kantō region of Japan.

According to the temple's own legend, it was founded by Kūkai in 810 AD after he returned from Tang dynasty China.

[1] The carvings are located on the wall of a large natural cave on the southwestern side of a hill made of Ōya stone called Otomeyama.

In the second quadrant is a sitting image of Shaka Nyōrai with a height of 3.5 meters, flanked to the left and right by Monju Bosatsu and Fugen Bostasu.

These statues are regarded as having extremely high artistic and academic value, along with the more famous Usuki Stone Buddhas in Oita Prefecture, and the carvings were also designated an Important Cultural Property of Japan in 1986.