Height from the Geospatial Information Authority of Japan (list of main mountains, March 31, 2026). Volcano facts from the Japan Meteorological Agency.
Mount Fuji is 3,776 meters high at its highest point, called Kengamine. It stands on the border between Yamanashi and Shizuoka prefectures.
In the national list of Japan’s main mountains, the second highest is Kita-dake in Yamanashi Prefecture, at 3,193 meters. Mount Fuji is 583 meters higher.
Mount Fuji is a stratovolcano, a cone built up from many layers. It formed on top of two older volcanoes, Komitake and Ko-Fuji.
Counting all three, its volume is about 400 cubic kilometers, and its base is about 50 kilometers across. There are about 100 smaller side volcanoes on its slopes.
Above about 2,450 meters, the mountain is bare rock. Wind wears it away, and the west slope is breaking down badly (the Osawa landslide area).
From 864 to 866, lava flowed from the side of the mountain. This lava, now called the Aokigahara lava, reached Lake Motosu and split an old lake called “Senoumi” into two lakes, Lake Shoji and Lake Sai.
The most recent eruption began on December 16, 1707 (the Hoei eruption), on the southeast slope. Ash fell on Edo (today’s Tokyo) that same day, and about 5 centimeters of ash piled up in Kawasaki.
Mount Fuji is an active volcano. The Japan Meteorological Agency watches it all the time.
In 2013, Mount Fuji became a World Heritage site. Its full name on the list is “Fujisan, Sacred Place and Source of Artistic Inspiration” (富士山‐信仰の対象と芸術の源泉‐).
It is listed as a cultural World Heritage site, and it is in Yamanashi and Shizuoka prefectures.
There is no single right answer. Talking it over with someone at home is a good way to learn.