Mount Ōyama (大山, Ō-yama), also Mount Afuri (阿夫利山 or 雨降り山, Afuri-yama) or Mount Kunimi (Kunimi-yama), is a 1,252 metres (4,108 ft) high mountain situated on the border of Isehara, Hadano and Atsugi in Kanagawa Prefecture, Japan. Together with Mount Tanzawa and other mountains in the Tanzawa Mountains it forms the Tanzawa-Ōyama Quasi-National Park.