22+ When Mount Fuji Last Erupted Background. This caused flooding in the nearby rivers. The last major eruption occurred in 1707, what's called the 'hōei' eruption after the the edo calendar period during which it took place.
As mentioned before, the last eruption of mount fuji was likely triggered by a powerful earthquake in the nankai trough region.
Mount fuji has erupted 16 times with 12 eruptions between 800 and 1083 ad.no eruptions had occured for past three hundred years. These are the five volcanoes most likely to erupt at any time (image: Mount fuji is actually privately owned. Fuji will blow due to new tectonic pressures that are higher than when the volcano last erupted more than 300 years ago.