View Mount Fuji Volcano Background. Fuji has erupted at various times starting around 100,000 years ago—and is still an active volcano today. The mountain as it appears now is the new fuji volcano, which began to erupt about 10,000 years ago.
It is the arrival of volcanic ash, however, that experts say could.
Scientists have discovered signs of a possible imminent eruption of japan's most famous volcano, mount fuji on honshu. Altitude sickness is also a concern on this hike because mount fuji reaches heights of nearly 12,400 feet. In 1707, however, that is exactly what happened. It became the 13th unesco world heritage site in japan on june 22, 2013.