Mount Ōyama, Kanagawa

Mount Ōyama
View from the South
Highest point
Elevation	1,252 m (4,108 ft)
Prominence	491 metres (1,611 ft)
Listing	List of mountains and hills of Japan by height
Coordinates	35°26′27″N 139°13′52″E / 35.44083°N 139.23111°E / 35.44083; 139.23111
Naming
Translation	big mountain rain mountain guardian of the land mountain (Japanese)
Pronunciation	[oːjama] [aɸɯɾijama] [kɯɲimijama]
Geography
Location	Kanagawa Prefecture, Japan
Parent range	Tanzawa Mountains
Topo map	Geographical Survey Institute 25000:1 大山 50000:1 東京
Geology
Age of rock	Middle Miocene-Late Miocene
Mountain type	Volcanic
Volcanic arc/belt	Izu-Bonin-Mariana Arc
Climbing
Easiest route	Hike

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-metre-high (4,108 ft) 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. Mount Ōyama is a popular sightseeing spot in Kanagawa Prefecture.

The mountain is made from non-alkali mafic rock. The rock is 7-15 million years old. The rock was extruded on the sea floor during the Neogene and then pushed up and onto the island of Honshu when the Izu-Bonin-Mariana Arc collided with the rest of Japan.

Mount Ōyama has long been regarded as a holy mountain and object of worship. Religiously motivated mountain climbing has been practiced since the Hōreki era (1751–1764) and the various paths leading there were called Ōyama Kaidō (大山街道, Ōyama Kaidō). Today this name survives as the pseudonym of Route 246.

At the top of the mountain is the head office of the Ōyama-Afuri Shrine (大山阿夫利神社, Ō-yama-afuri Jinja). Lower down the mountain is the lower shrine and the Ōyama-dera (大山寺). Afuri refers to the high amount of rain and clouds associated with the mountain. Farmers pray at Ōyama-Afuri Shrine to the rain god.