Niseko Onsen-kyo

A string of bath hamlets at the foot of Annupuri

Niseko Onsen-kyo is not a town but a loose necklace of small bath districts strung along the eastern foot of Mt. Niseko-Annupuri and spilling east toward the perfect cone of Mt. Yotei. The Japan Spa Association lists four members under the name, Konbu, Annupuri, Yumoto and Goshiki, and in practice the ski-side hamlets of Hirafu and Moiwa belong to the same family of waters. The oldest inn on record, Koikawa Onsen Ryokan in Konbu, opened in 1899; Goshiki, the highest of the group at 750 metres, has run continuously since 1930. Through the Meiji and Taisho years these were modest tōji villages reached from the new railway, then in the postwar decades the slopes above them were laid out as ski runs, and from the early 2000s an Australian-led international boom turned Hirafu into one of the most cosmopolitan winter villages in Japan. In 1958 the constellation was inscribed as a National Health Resort.

Four waters, four moods

Each district keeps a distinct character because the water under it is different. Goshiki pours an acidic sulfur spring (pH 2.6, 76°C at the source) whose colour is said to shift through five shades with the light; the inn's free outdoor rotenburo sits in a saddle between Annupuri and Iwaonupuri. Konbu, the largest of the cluster, is a chloride spring, slick and warming, and lines a wooded stream that turns red in October. Yumoto is sulfurous and ties to the Ōyunuma steam lake, where rare iō-no-tama, sulfur balls, form on the bottom. Annupuri, added to the designated area in 2024, is bicarbonate-rich and gentle on the skin. The context for all of them is the same: world-class powder snow off the Sea of Japan, and quiet wooden inns spaced minutes apart by road rather than huddled along one street.

Ski lines above, Yotei across the valley

In winter the lifts open straight out of Hirafu, Annupuri, Hanazono and Moiwa onto a single linked mountain; in summer the ridge between Annupuri and Iwaonupuri offers a short alpine traverse that finishes with a soak at Goshiki. From the eastern baths the view across the Shiribetsu valley is held by Mt. Yotei, the Ezo-Fuji, whose snow hangs on into June.