In late 2000, monitoring stations noticed a rapid increase in the number of low-frequency quakes around Mount Fuji, indicating that magma was on the move again underground, and that Fuji is still an active volcano. Japan's national government and the governments of municipalities located around the mountain were concerned, and in 2001 they asked volcanologists to produce a “hazard map” to estimate the damage that could occur during another major eruption.
Vers la fin de lannée 2000, les postes de contrôles notèrent une rapide augmentation du nombre de séismes de basse fréquence autour du Mont Fuji, indiquant que le magma recommençait à circuler plus activement sous terre, et donc que le Fuji était toujours un volcan bien actif.