Hakuba Happo-One Snow Resort Mountain
The landform the resort sits on: the shape of the hill beyond the pistes, how steep it gets, and where it stands among the mountains on JapowDB.
One hillside, and it falls away to the east-north-east.
That steep ground sits high on the mountain.
Where this vertical sits among the mountains on JapowDB
1,071 m, more than 31 of the 34 mountains on JapowDB.
The mountain
八方尾根 (Happō-one)
- Above it
- 唐松岳 (Karamatsu-dake) 2,696 m
- Landform
- Happo-one is a ridge. It runs east off Karamatsu-dake and drops 1,900 m to the valley in a single line, which is why the whole hill faces one way and why the vertical here is the largest on JapowDB.
- Rock
- The rock is serpentinite, an ultramafic rock, Ordovician to Silurian and around 450 million years old, far older than anything else on JapowDB. The same rock is why the upper ridge is open ground: serpentinite weathers into soil too poor for most trees to take hold, so the ridge is bare at a height where you would expect cover. Lower down it is loose fan and talus, laid far more recently.
From published sources, checked by hand · 2026-08-12
That ground is outside the ski area. It is not patrolled.
Measured
01
Which way it faces
Faces east.
Most of the mapped runs fall away toward the east.
02
How steep it gets
Its steepest pitch measures 35.5°.
Its steepest tenth is steeper than 30 of the 34 mountains here that carry pitch data.
22.7° the steepest tenth of runs
03
How varied it is
Its runs range from 7.1° to 27.0°.
Half of them are gentler than 15.8°. Each mark is one run.
That spread is wider than 26 of the 34 mountains here that carry pitch data.
04
What grows on it
Mostly deciduous: broadleaf woods and larch. They stand bare through the winter, so you can see a long way into them.
Read off the national vegetation survey (2024 edition), from fieldwork in 2017.
The forest on this mountain, in detail