Mount Nantai

Mount Nantai (男体山, Nantai-san, lit. 'male-body mountain', also called Mount Futara (二荒山, Futāra-san)) is a stratovolcano in the Nikkō National Park in Tochigi Prefecture, in central Honshū, the main island of Japan. The mountain is 2,486 metres (8,156 ft) high. A prominent landmark, it can be seen on clear days from as far as Saitama, a city 100 km (62 mi) away.

Alongside Mount Nikkō-Shirane, Mount Nantai is one of the newest volcanic edifices in the National Park. Scientific studies of the volcano's geological structure began in 1957 and have established that it was formed roughly 23,000 years ago and that its last eruption was 7000 years ago. The volcano was classified as active by the Japan Meteorological Agency in June 2017.

Since its first known ascent by Buddhist monk Shōdō Shōnin in the 8th century AD, Mount Nantai has become a sacred mountain and a site of pilgrimage in Buddhism and Shinto. As such, it is currently maintained by Futarasan jinja, a Shinto shrine whose go-shintai (御神体) constitutes Mount Nantai. With Tōshō-gū and Rinnō-ji, the site forms the Shrines and Temples of Nikkō, a UNESCO World Heritage Site. Archaeological excavations conducted here from the 19th to 20th centuries have unearthed many artifacts, dating from the end of the Nara period in the 8th century AD to the Edo period from the 17th to 19th centuries. A few of these have been declared Important Cultural Properties by the Japanese Agency for Cultural Affairs.

Mount Nantai is listed among the 100 Famous Japanese Mountains as written by mountaineer and author Kyūya Fukada.