
GUNMA & NIIGATA MOUNTAINS
Mt Naeba
Elevation
Difficulty
Time
1,789 m
Niigata and
Nagano prefectures
7-8 hours
Haraigawa trailhead
Koakazawa trailhead
Beautiful table mountain with alpine marshland
Mt Naeba (Japanese: 苗場山) is a striking hyakumeizan* mountain on the border of Niigata and Nagano, a broad, flat‑topped table mountain whose shape is instantly recognizable from every direction. Its height and form give it a quiet grandeur, and the experience of climbing it feels different from most peaks in the region. First there's a steep, sustained ascent up the side of the table, and then a sudden release onto a wide, open plateau.
Both approaches, Niigata from Yuzawa and Nagano from the Sakae side, have their charm. The Yuzawa route is the most popular, rising quickly through deep forest before tackling the steep slopes that guard the plateau. It’s a demanding climb, but the moment you crest the rim and step onto the broad alpine plain is unforgettable. Pools of clear water lie scattered across the plateau, reflecting sky and lingering patches of snow. The unrestricted views stretch across the surrounding mountains.
The Nagano approach is quieter and to my mind more rewarding. It allows you to quietly traverse the entire plateau, walking across its gentle undulations and passing the alpine ponds that dot the highland. The sense of space is remarkable with wide skies, open ground, and the feeling of being on a high, ancient surface shaped by volcanic uplift and long erosion. When snow remains in late spring or early summer, the contrast between white patches, dark earth and bright pools makes the landscape even more beautiful.
Mt. Naeba is a mountain of contrasts with steep forested slopes giving way to a calm, expansive summit world, a popular Niigata trail balanced by a quieter Nagano traverse, and a rugged border peak softened by its broad, grassy plateau.
* 100 famous mountains of Japan
(All information here is based on personal observations and experiences. Check official sources before planning or starting any hikes.)