Rankoshi Town Exchange Promotion Center Yuki Chichibu

The Rankoshi Town Exchange Promotion Center Yuki Chichibu, also known as Yukichichibu Onsen, is a community-owned hot spring facility located in the Niseko region of Hokkaido. The center was refurbished in 2015, transforming it into a modern facility while maintaining its authentic character. The complex sits adjacent to Otama Numa, a natural turquoise sulfur onsen pond that shares the same geothermal source as the bathing facilities.

The onsen's natural spring water is distinguished by its high sulfur and iron content, making it one of the region's most mineral-rich bathing experiences. Local onsen sommelier Tsutomu Sato notes that the presence of pure sulfur water and mineral mud is a phenomenon found in only a handful of locations across the Japanese archipelago. The sulfur water is particularly effective for healing skin and acts as a natural moisturizer, while the thermal mud from the bottom of certain baths provides enhanced therapeutic benefits.

Visitors can experience eight different bathing pools throughout the facility. The women's section features four different outdoor baths including a distinctive mud bath, where guests can apply the mineral-rich mud as a natural facial treatment. The men's side offers two indoor pools and two outdoor pools. All baths utilize completely natural, unfiltered onsen water, and the facility provides shampoo, body soap, and hair dryers in the washing and changing areas. The complex includes a restaurant serving Japanese meals such as soba and curry, a shop with souvenirs and local produce, and a tatami mat rest area with views of the surrounding landscape.

The facility is located at 680 Aza-Yusato, Rankoshi Town, Isoya District, Hokkaido 048-1321. It sits on Highway 66 between Konbu Onsen and Goshiki Onsen, approximately 30 minutes by car from the Hirafu ski area. The center operates on a cash-only basis and is not tattoo-friendly, though tattoo cover stickers can be purchased for ¥300. A book of 10 tickets is available for ¥5,000, and visitors who purchase tickets on the 26th of each month (Bath Day) receive one free bath. Small valuables can be stored in lockers near reception for a refundable ¥100 coin deposit.