Green Lake Ashi ship Lake Ashi (?¦ã???, ?), or Hakone Lake, Ashinoko Lake, is a scenic lake in the Hakone area of Kanagawa Prefecture in HonshÅ«, 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. Several pleasure boats and ferries traverse the lake, providing scenic views for tourists and passengers. One of the boats is a full-scale ...