Mt. Hodatsu has a primeval forest of Japanese Beech, which is very rare in Noto, and a large forest of cedar, mizunara oak, konara oak, hornbeam and Japanese walnut. Forests can serve to prevent landslides and floods, and as water sources. The forest on Mt. Hodatsu was classified as one of the 100 Selected Water-source Forests by the Forestry Agency in 1995. In order to conserve and nurture their luxuriant forests, local residents established the Mt. Hodatsu Water-source Forest Association. It was developed from the Oshimizu Mt. Hodatsu Water-source Forest Association, which was launched in 1993. After two towns were merged into one town called Hodatsushimizu Town, the name of the association was changed. The association plants saplings of Japanese chestnut oak, konara oak and Ate every year, and also works on underbrush clearing.