| Mount Utsugi | |
| Other Name: | 空木岳 |
| Elevation M: | 2864 |
| Range: | Kiso Mountains |
| Listing: | Mountains of Japan |
| Location: | Kiso District and Kamiina District, Nagano Prefecture, Japan |
| Map: | Japan |
| Coordinates: | 35.7189°N 137.8169°W |
| Fetchwikidata: | ALL |
is a mountain located on the boundary of Okuwa, Iijima and Miyada, Nagano Prefecture, in the Chūbu region of Japan. It is 28640NaN0 tall and part of the Kiso Mountains. It is also included on the list of "100 Famous Japanese Mountains."
The landscape of Mt. Utsugi includes large granite boulders surrounded by lush greenery. Due to its distance and elevation gain it is usually completed as an overnight hike. The trail begins in the town of Komagane which is also popular for its onsen and the Komagatake Ropeway.