Shiga Kogen Ichinose Family 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.
Broadly one hillside, leaning to the north-west.
Where this vertical sits among the mountains on JapowDB
320 m, more than 5 of the 49 mountains on JapowDB.
The mountain
東館山 (Higashidate-yama)
- Above it
- 寺小屋峰 (Terakoya-mine) 2,125 m
- Landform
- Higashidate-yama (1,994 m) is one of the peaks around Shiga Kogen, a high plateau built by lava flows. The runs sit on its north flank and stop about 40 m below the rounded summit. The ridge keeps climbing south-east from there to Terakoya-mine (2,125 m) without a real dip in between.
- Rock
- Every run sampled, from the top of the lifts at 1,952 m down to the base at 1,625 m, sits on one formation: andesite and basaltic andesite lava and pyroclastic rock from the late Pleistocene, roughly 130,000 to 12,000 years old. The summit of Higashidate-yama is the same young rock. Terakoya-mine above it is much older andesite, from the late Miocene to the Pliocene, several million years old. So the whole vertical you ride is one young volcanic layer laid against older ground.
From published sources, checked by hand · 2026-10-15
That ground is outside the ski area. It is not patrolled.
Measured
01
Which way it faces
Faces north-west.
Most of the mapped runs fall away toward the north-west.
02
How steep it gets
That steep ground sits high on the mountain.
Its steepest pitch measures 26.3°.
Its steepest tenth is steeper than 14 of the 49 mountains here that carry pitch data.
16.3° the steepest tenth of runs
03
How varied it is
Its runs range from 7.8° to 16.3°.
Half of them are gentler than 12.4°. Each mark is one run.
That spread is wider than 2 of the 48 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 2013.
The forest on this mountain, in detail