NORTH ALPS
Mt Jonen
Elevation
Difficulty
Time
2,857 m
Nagano prefecture
8-10 hours
Ichinosawa trailhead
Mitsumata trailhead
Iconic pyramid peak
Mt Jōnen (Japanese: 常念岳) is one of the iconic hyakumeizan* peaks of the North Alps, a steep, pyramid‑shaped mountain that rises sharply above the Matsumoto valley and serves as a symbol of the region. You can see its pointed form from around the valley below, especially in the clear air of winter, late autumn and early spring.
Access, however, requires care. The Ichinosawa forest road has suffered repeated collapses in recent years, and it is often closed for long stretches. Anyone heading for Jōnen needs to check the latest conditions before setting out. When the road is open, the mountain can be climbed as a very hard day hike, though many hikers choose to stay at the excellent Jōnen-goya hut, which sits below the summit ridge.
The route begins in deep forest, a long approach through cedar and birch. After a couple of hours the trail crosses the river and sometimes merges with it. After heavy rain, this section can be hazardous, as the water spreads across the stones and erases the boundary between trail and stream. The mountain then begins to reveal its alpine character as you climb through a narrow valley where snow can remain until late in the season.
In late spring, when snow still fills the upper valley, you can take a direct line up the snowfield to the hut. It’s one of the most enjoyable ways to climb Jōnen with firm spring snow, cool air and the dramatic pyramid of the peak rising above you. The final ascent is rocky and steep, a classic North Alps finish. Near the summit, raichō rock ptarmigans often appear, perfectly camouflaged among the stones.
From the top, the views are superb with Mt Yari (槍ヶ岳) and the Hotaka range (穂高連峰) on the other side of the valley. Jōnen is also a gateway to longer adventures: from the summit, you can continue on a traverse to Mt Chō (蝶ヶ岳), one of the finest ridge walks in the range.
* 100 famous mountains of Japan
(All information here is based on personal observations and experiences. Check official sources before planning or starting any hikes.)