* Historical Eruptions: Mount Fuji has a documented history of eruptions, with the most recent one occurring in 1707-1708. This relatively recent activity indicates the volcano is still capable of erupting.
* Seismic Activity: The area around Mount Fuji experiences frequent earthquakes and tremors, which are signs of magma movement beneath the surface. This ongoing activity suggests the volcano is still "alive" and potentially active.
* Gas Emission: Mount Fuji emits gases like sulfur dioxide, which is a typical sign of an active volcano.
* Deformation: The mountain's shape and surrounding land are undergoing subtle changes, likely due to magma pressure and movement beneath the surface.
Therefore, Mount Fuji's recent activity, seismic behavior, gas emissions, and deformation provide strong evidence that it is not simply dormant, but rather an active volcano with the potential to erupt in the future.
It's important to remember that the definition of "active" for a volcano can vary depending on the source. However, most experts agree that Mount Fuji meets the criteria for being considered an active volcano.