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NAGANO MOUNTAINS

Mt Mizunoto

Elevation
Difficulty
Time

2,202 m

Nagano prefecture

3-4 hours

Kurumasaka trailhead 

Rocky scrambling on the crumbling volcano

Mt Mizunoto (水ノ塔山) is one of the lesser‑known but quietly dramatic peaks of the Asama range, a mountain shaped by volcanic forces, steep ridges. It sits in the centre of the wider Asama massif, close to Mt Takamine (高峰山) and I often climb them in a set, sometimes even with neighbouring Mt Higashi-Kagonoto (東篭ノ塔山). But Mizunoto feels far more rugged and untamed than its neighbours. 

The topography is unmistakably volcanic. The mountain rises in a series of broken ridges and rocky folds, its slopes composed of weathered lava, ash and loose debris that shift underfoot. The forested lower sections give way to rough, mineral‑rich ground where hardy shrubs and grasses cling to the soil. Mizunoto’s summit ridge is narrow and uneven, shaped by erosion and the slow crumbling of volcanic rock.

Its location adds to the mountain’s character. Mizunoto is more remote than other parts of the Asama highlands, reached by quiet forest roads and trails that see far fewer visitors than nearby peaks. One of the defining features of the mountain is the traverse west of the summit towards Higashi-Kagonoto. This section is notoriously fragile with crumbling slopes where the rock breaks away easily to precipitous drops. Hikers must move carefully and stay alert, especially in winter. 

From the summit, the views are wide and rewarding with views of the town far below. Mt Kurofu (黒斑山) dominates the eastern skyline, while to the east you can see the Ikenotaira plateau and the pointy summit of Mt Higashi-Kagonoto.

(All information here is based on personal observations and experiences. Check official sources before planning or starting any hikes.)

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