Fuji-san last erupted in 1707, and today only an occasional puff of steam breaks through its crust, the fitful snore of a sleeping giant.
An eruption occurred on Fuji-san ten years ago. 
mnli hypothesis: An eruption occurred on Fuji-san ten years ago.  premise: Fuji-san last erupted in 1707, and today only an occasional puff of steam breaks through its crust, the fitful snore of a sleeping giant.