Lake Ashi, or Hakone Lake, Ashinoko Lake, is a scenic lake in the Hakone area of Kanagawa Prefecture in Honshū, Japan. It is a crater lake that lies along the southwest wall of the caldera of Mount Hakone, a complex volcano. The lake is known for its views of Mt. Fuji and its numerous hot springs. A number of pleasure boats and ferries traverse the lake, providing scenic views for tourists and passengers. Several of the boats are full-scale replicas of man-of-war pirate ships.