Landforms of Tanna Fault and Tanna/Tashiro basins; view of the landforms of Fuji, Hakone, and Ashitaka volcanoes

The straight valley stretching on from Tanna Basin right below to Tashiro Basin is the location of Tanna Fault.

The straight valley extends all the way to the vicinity of Hakone Volcano and disappears from there, probably hiding under the volcanic products of Hakone Volcano.

On a fine day one can see all the way to Mt. Fuji from here.