While driving the national highway No. 325 from Takamori to Takachiho for 15 minutes， you can see a big arch bridge. This is the Okuaso Ohashi which is one of forks of Gokase River， built over the Kawabashiri valley， and its height is 120m from the river.

This bridge is made of steel ”weathering steel”. Its color is chocolate although it is bare steel. You can see particularly beautiful view in the season when the surface of mountain turns its color.

・Okuaso Ohashi
・Style: Steel arch
・Length of bridge: 360m (Maximum span: 210m)
・Completion: 1989