The summit of Mt. Fuji (35.21 N, 138.43E, 3776m a.s.l.) receives the upper air mass over East Asia transported from the Asian Continent through the free troposphere, thus providing an ideal
observation site for atmospheric chemistry and physics, such as PM 2.5, sulfate aerosol, and mercury.
In addition, it also serves as a good observation site for lightning, cosmic ray, transient luminous events (sprite) as well as for high altitude medical research including the training of climbers. Researchers on permafrost and ecological studies are also performed at the station.