Established in 1997, we operate a day spa, an onsen ryokan, and a sauna and camp site. Apart from onsen ryokan, we are mainly engaged in the hot spring mining business (drilling) throughout Japan. Many of our staff members are not only from Gunma, but also from outside the prefecture.

Sasasanoyu is a completely free-flowing natural hot spring approved by the Pure Onsen Association as a "hot spring that uses the source as it is. No water is added, no water is heated, no water is circulated or filtered, and no bath salts are used." The hot spring water gushes from the source at a rate of approximately 300 liters per minute, so you can always enjoy an abundance of free-flowing hot-spring water. The lukewarm water has a reputation for being good for the skin, and is popular with local and distant guests as “hot water for beautiful skin” with alkaline simple hot spring water (spring temperature: 40-42°C). The hot spring is gentle and safe for everyone from children to the elderly. The open-air bath offers a peaceful view and a relaxing time amidst the murmuring of the river. There are 5 rooms on the second floor for overnight stays. We have a kettle, a green tea set, free WIFI, bath towels, face towels, toothpaste, a comb, and a razor for men. Yukata (Japanese bathrobe) can be rented free of charge upon request. A microwave and toaster are also available for guests staying overnight without meals. We look forward to serving you when you visit Katashina Village for hiking in Oze, winter sports, mountain stream fishing, marathons, and hot-spring cures.

Oze Ooshimizu Hatotatoge: about 30 minutes driving to the trailhead - Big Fall Fukiwari : about 10 minutes drive - Oze Iwakura Ski Resort and Maruyama Kogen Ski Resort: about 30 minutes drive - Ogunahotaka Ski Resort: about 20 minutes drive