Yamanouchi (山ノ内町, Yamanouchi-machi) is a town located in Shimotakai District in Nagano Prefecture, Japan.

Yamanouchi, located in the Japanese Alps, includes Shiga Highlands, one of the largest ski resorts in Japan.

Yamanouchi is also home to Jigokudani Monkey Park where Japanese macaques can be found soaking in an outdoor hot spring.

These macaques were part of the opening sequence in Baraka, the 1992 non-narrative documentary film directed by Ron Fricke.

In winter, damp air from the Japan Sea hits the mountains causing heavy snowing.

The plateau above the town is dotted with over 70 large and small wetlands and ponds which can be traced to volcanic activity.