Oyunuma Pond & Yukichichibu Onsen
大湯沼・雪秩父
The boiling sulfur marsh of Yumoto Onsen in Niseko, about 400 meters around, steaming and bubbling. Next door, Yukichichibu has open-air baths filled with mud water.
Oyunuma is a hot spring marsh formed by volcanic activity. Hot springs and gases above about 60°C bubble constantly up from the lake bed. The water shows sulfur yellow and mud gray, steam hangs over it, and a loop trail around the lake takes about 15 minutes. Right next door, the Rankoshi Town day-use hot spring “Yukichichibu” has open-air baths that use water from Oyunuma, along with distinctive mud baths said to be good for the skin. Admission is about 800 yen. It's open roughly 10:00 to 19:00 and closed on Tuesdays. Located along the Niseko Panoramic Road, it's about 10 minutes' drive from Goshiki Onsen and about 30 minutes from Hirafu. The sulfur smell is strong, and visitors should not cross the railings near the high-temperature marsh.
Opening hours
Marsh open all day; Snow Chichibu approx. 10:00–19:00, closed Tuesdays
Nearby sights
- Shinsen-numa Marsh
- Niseko Goshiki Onsen
- Mount Niseko Annupuri
- Niseko Takahashi Dairy Farm
- Niseko United
- Hirafu Village
- Niseko HANAZONO Resort
- Shiribetsu River Rafting