Mount Neko (根子岳, Neko-dake) is a mountain in Jōshin'etsu-kōgen National Park with an elevation of 2,207 m (7,241 ft), located near Ueda and Suzaka in Nagano Prefecture, Japan.

[4] The mountain should not be confused with a similarly named Mount Neko (根子岳) in Kumamoto Prefecture.

Mount Neko forms the western peak along the rim of the Azumaya Volcano (四阿火山, Azumaya-kazan) caldera.

[6] There is a public toilet beside the trailhead, and across the road is a small shop, selling ice cream from Sugadaira Farm.

In winter, it is possible to ride a snowcat to an altitude of 2,170 m (7,120 ft), just below the summit, to see "snow monsters" formed from the hard rime phenomenon.