Tateyama Backcountry
Mt. Onanji 3,015m · ToyamaSpring season
- Avalanche
- JAN Avalanche Bulletin (Tateyama) ↗
- Rules
- Skiing or climbing in the Murodo area in April–May and November requires an entry form at the Murodo Terminal safety desk or via Compass. Entering the Mt. Tsurugi area from December to 15 May requires notice 20 days ahead (penalties). Ptarmigan zones and Jigokudani are closed. Official ↗
- Trip plan
- File one. Compass (Japan Mountain Guides Assn.) ↗
This page is not route guidance. It's information to help you decide. Carry avalanche gear, know how to use it, and go with a guide if in doubt.
Terrain
Colours show terrain angle (30° yellow, 35° orange, 40° red, 45°+ purple). Most avalanches start on 30–45° slopes, but no colour does not mean safe. Overlay your own GPX/KML to see distance and slope (the file is read on your device only, never uploaded).
Map & elevation: GSI Japan (slope computed by Japow Now! from the 10 m elevation tiles)
Routes
Route maps on yama-ski.jp (Japanese). Download the GPX and add it to the map above to see it with slope angles.