Backcountry areas · Niseko / Shiribeshi
Iwaonupuri
↕ 691 m · 2 Routes · Explore in 3D
Iwaonupuri is an active volcano of the Niseko volcanic group (JMA-listed and monitored; no volcanic alert level is currently operated and no access restriction is in force). The crater area west of the summit is sulphur/geothermal ground with recorded historical fumarole activity. Check the latest JMA volcano information before touring.
出典：国土地理院（標高タイル DEM10B を加工して作成）出典：国土地理院（標高タイル DEM10B を加工して作成） / CC BY-SA 4.0
Mountain facts
4 fields without data yetEvery field shows its source and check date. A field without data says UNKNOWN; nothing is left blank or guessed.
- Name / area
-
イワオヌプリ · Iwaonupuri · イワオヌプリ（Iwaonupuri）
Niseko / Shiribeshi
Source: SnowWind areas dataset - Elevation
-
1116 m (surveyed summit height)
1294 m (highest point in the terrain data, DEM10B) · ↕ 691 m
Source: GSI (surveyed heights, DEM10B) · Checked 2026-09-23 - Municipalities
-
蘭越町 Rankoshi · ニセコ町 Niseko
Source: GSI reverse geocoder · Checked 2026-07-09 - Trailheads / parking
-
Large snow-cleared parking area · 759 m
Source: Parking waypoints of the GPX routes (CC BY-SA) · Checked 2026-09-13 - Winter access
-
Winter road-closure status is published by Hokkaido’s road authorities. We link to the official source; we do not republish or cache it.
Source: Hokkaido road authorities / CERI (link only) - Route aspects
-
NE · E · SE · S · SW
Aspects the steep sections of recorded routes cross; not the whole mountain.
Source: Computed from DEM10B · Checked 2026-09-23 - Terrain class (estimate)
-
complex 2
Slope-based automatic estimate, not official ATES.
Source: SnowWind slope estimate · Checked 2026-09-23 - Recorded routes
-
2
Route data: CC BY-SA 4.0 (incl. Hokkaido Wilds, CC BY-SA)
Source: CC BY-SA 4.0 · Checked 2026-09-23 - Official avalanche bulletin
-
We link to bulletins and never republish their content.
Niseko Avalanche InstituteJapan Avalanche Network — SW Hokkaido (Niseko / Yotei / Yoichi / Shiribetsu)
Source: Niseko Avalanche Institute / Japan Avalanche Network — SW Hokkaido (Niseko / Yotei / Yoichi / Shiribetsu) - Police station / where to file a 登山届
-
倶知安警察署（Kutchan Police Station） · 0136-22-0110 · 倶知安町 Kutchan・蘭越町 Rankoshi・ニセコ町 Niseko
Station numbers are not emergency lines; in an emergency call 110.
倶知安警察署（Kutchan Police Station）北海道警察 オンライン登山計画書Compass 登山届システムYAMAP(道警と閲覧協定)Draft a 登山届 from your plan
Source: 北海道警察 https://www.police.pref.hokkaido.lg.jp/intro/syozai/syozai.html · Checked 2026-07-31 · 登山届 2026-09-06 - Emergency huts
- UNKNOWN
No hut waypoint in the route data.
Source: GPX route waypoints - Volcano alerts
-
A JMA-monitored volcano.
Summit-west crater (sulphur / geothermal ground)
Iwaonupuri is an active volcano of the Niseko volcanic group (JMA-listed and monitored; no volcanic alert level is currently operated and no access restriction is in force). The crater area west of the summit is sulphur/geothermal ground with recorded historical fumarole activity. Check the latest JMA volcano information before touring.
Source: JMA (link only) - Nearest AMeDAS station
-
倶知安（Kutchan）· 176 m · 9.6 km
Source: JMA AMeDAS station table · Checked 2026-09-02 - Live camera
- UNKNOWN
No live-camera source compiled for this mountain yet.
Source: To be added - Snow season
- UNKNOWN
Not compiled yet. Planned from AMeDAS snow-depth history.
Source: To be added - Nearby resorts
-
Niseko United · 3 km · Rusutsu · 28 km · Kiroro · 36 km
Source: Straight-line distance between SnowWind 3D dataset centres - Guide services
- UNKNOWN
Real guide listings are in preparation; the directory is a fictional sample for now.
Source: SnowWind
Today / tomorrow briefing
Loading…
Set reminders inside Google Calendar
Routes in this area: Iwaonupuri — NE Chute · Iwaonupuri — Goshiki Onsen Route
A planning aid, not a verdict. Always check the day’s official avalanche bulletin and decide in the field.
Today's conditions
Safety
Routes
Access & terrain features
Route GPX waypoints and elevations are planning data. Verify them against current official information and in the field.