Yomase Onsen Ski Area

Yomase Onsen Ski Area doesn’t operate entirely as a standalone mountain. It’s paired with the neighboring X-JAM Takayama area under the shared marketing name Mt.KOSHA, with linking courses and lifts connecting the two so a single lift ticket covers both. On its own recorded terrain, Yomase Onsen runs 6 chairlifts across 11 runs and 7.43 kilometers, climbing 450.3 vertical meters from a 727.9-meter base to a 1,178.2-meter summit in Yamanouchi town, Nagano Prefecture.

The resort’s name comes directly from Yomase hot spring, part of the same stretch of Yamanouchi that’s long drawn onsen visitors alongside skiers, giving the area a dual identity as both a ski destination and a hot-spring town stop. That combination, easy-to-reach mountain skiing plus a soak afterward, is common across this part of Nagano but is written directly into this resort’s own name.

Terrain here is built overwhelmingly around the middle of the difficulty range: 6.49 kilometers of intermediate runs dwarfs the 0.82 kilometers of advanced and just 0.12 kilometers of easy terrain recorded on Yomase Onsen’s own side of the connected area. The resort’s own marketing echoes that split, describing itself as especially well-suited to entry-level and intermediate skiers rather than to experts chasing steep terrain, a positioning the run data supports even before factoring in the connected X-JAM Takayama side.

Access runs through central Nagano Prefecture: Nagano city, population around 372,800, is the closest major population center at just 25.5 kilometers, with Jōetsu (43.2 km) and Ueda (44.3 km) also within reach. Shinshu-Matsumoto Airport, 81.7 kilometers away, is the nearest airport, while Niigata Airport, 143.8 kilometers out, serves as the area’s more distant listed gateway for travelers coming from farther afield.

Six chairlifts is a small lift fleet by regional standards, and with no gondola or high-speed detachable listed, most laps here involve fixed-grip chairs rather than fast uphill transport. That fits a resort built for steady day-to-day skiing rather than one competing on lift infrastructure, and it keeps Yomase Onsen positioned as a straightforward, learner-friendly stop for visitors already spending time in the Nagano hot-spring towns rather than a headline destination in its own right.

The base-to-summit rise, 727.9 meters to 1,178.2 meters, is modest, and combined with the resort’s own emphasis on connecting to X-JAM Takayama for a wider combined terrain footprint, it’s clear the operators see the shared Mt.KOSHA branding as core to the resort’s appeal rather than treating Yomase Onsen as a standalone product. For a visitor planning around the intermediate-heavy 6.49 kilometers of graded terrain on Yomase Onsen’s own side, the practical takeaway is that a single lift ticket unlocks meaningfully more skiing than the 11-run, 7.43-kilometer figures for this side of the mountain alone would suggest. With six chairlifts and a 450.3-meter vertical drop feeding almost entirely intermediate terrain, the mountain reads as a low-risk, easy-to-navigate option for skiers who want to spend a full day building confidence rather than hunting for steep pitches, especially once the connected X-JAM Takayama runs are factored into the same day’s skiing on one ticket.