5 - 6
FATMAP difficulty grade
This is a relatively mellow route up to a 1255m prominence on the sheltered southeastern flanks of Rishiri-zan (利尻山, 1721m).
It gives full-frontal views of Rishiri-zan's powerful southeastern upper face.
Be prepared for world-class alpine scenery on par with the spires of Patagonia and the bulwarks of the Himalayas.
If there is a creator, she used this side of Rishiri as a petri dish.
The route starts at the old Oniwaki Ski Field, and follows the impressive Yamunai-zawa (ヤムナイ沢) gully on its upper southern ridge.
There's nothing technical on this route, so even intermediate backcountry travelers, in careful consultation with the weather forecast, will enjoy it. https://hokkaidowilds.org/ski-touring/rishiri-zan-yamunaizawa-south-ridge-ski-tour