There is a beech forest in the upper stream of "Kurokawa" which is the most transparent in the Shimanto River branch. It is wonderful that the autumnal leaves shine on the river surface where valleys are covered. It is also known as the hometown of the Yarosta, the valley of the amego. When you get off the river near the river, bring it closer to autumn leaves. Kuoncheon River was selected for Heisei's 100 name water selection in 2008.
- [Average year data]The leaves begin to color: late October ～ early November
- beginning of November ～ mid November