Mount Fuji

At the end of each climbing season, Fujiyoshida City holds a two-day fire festival at the base of the mountain.

An excerpt from the article 25 facts about Mount Fuji
The Yoshida Fire Festival is held on August 26th and 27th. Its purpose is both to celebrate the end of a climbing season and keep volcanic eruptions in check, by appeasing the goddess Konohanasakuya-hime.