Mount Nasu is a group of complex volcanoes located in the northeast part of Nikkō National Park, Japan. The tallest peak is Sanbonyari Peak at a height of 1,916.9 m (6,289 ft). Mount Nasu is one of the 100 Famous Japanese Mountains.

100 Famous Japanese Mountains is a book written in 1964 by mountaineer and author Kyūya Fukada. The list became famous when Crown Prince Naruhito, now Emperor, took note of it. The list has been the topic of NHK documentaries, and other hiking books. An English edition, One Hundred Mountains of Japan, translated by Martin Hood, was published in 2014 by the University of Hawaii Press (ISBN 9780824836771).