Onsen is not sauna, but onsen culture and sauna culture meet at the same temperature, with the same reverence for water and stone. Our 9 Japanese Curator's Picks span Beppu's eight-circles thermal city, Hakone's mountain ryokan, Naoshima's contemporary-art bathhouse, and the new wave of urban Tokyo saunas.
"Hadaka no tsukiai. Naked friendship. The Japanese phrase for the candor that emerges between bathers in an onsen."
Japan sits on a tectonic furnace. Every island has hot springs, every prefecture has its onsen brand, every village has at least one bathhouse the locals would die before letting close. Volcanic heat, mineral chemistry, and a thousand years of bathing etiquette converge here in a way no other country has matched.
Our gold list privileges the historically continuous places (Beppu, Hakone, Kusatsu) and the architecturally significant ones (SAZAE on Naoshima, From P in Hakuba, JIKON in Tokyo). Some onsen require a stay at the ryokan that owns them; those access notes are clear on each venue page.
Each card below links to a full venue page with hours, access notes, type, and editorial context. Cards are ordered alphabetically.
Beppu Onsen is an onsen in Beppu, Japan, featuring a steam sauna.
Dogo Onsen is a japanese onsen in Matsuyama.
A glamping site combining a barrel sauna with dome tents (integrated stove systems) and outdoor structures for cooling and rest. Featured in CN Traveller's 'World's Most Beautiful Saunas'.
Historic mountain onsen town in Obanazawa, Yamagata, where multi-storey Taisho-era wooden ryokan line a lantern-lit river. Named "silver mountain" after a 500-year-old mine.
The official Hakone travel guide for your visit for hot springs, hiking, and to discover things to do, popular attractions, and places to stay.
Rooftop Finnish-style sauna atop Hakuba Highland Hotel with full panoramic view of the Northern Alps.
Saunachelin 2025 #2. The urban sauna of the future with five saunas, three water baths, and theatrical steam performances.
緑豊かな山々に囲まれた三十軒の旅館が集う熊本・阿蘇の温泉地「黒川温泉」。季節ごとに美しく表情を変える景観と、豊富な泉質を堪能いただく露天風呂の湯巡り。里山ならではの、ゆったりと流れる上質な時間をお楽しみください。宿のご予約もこちらから。
天下の名湯「草津温泉」のポータルサイトです。温泉のみならず、草津に関する情報盛り沢山！きっと貴方も、草津の達人になれる！
Hokkaido's most famous onsen with 9 types of thermal water. Jigokudani (Hell Valley) volcanic landscape.
Saunachelin 2025 #2. The urban sauna of the future with five saunas, three water baths, and theatrical steam performances.
Designed by Kengo Kuma & Associates with interiors by Japanese sauna collective TTNE; named after the sazae, a conical sea snail native to Japan. Part of Naoshima's contemporary art programme.
Saunachelin 2025 #5. Tokyo's urban wellness escape in Meiji Park with multiple saunas and herbal infusion baths.
Hot-spring resort town under Mt. Yufu in northern Kyushu. Known for design-led ryokan, contemporary art galleries, and morning mist photographs.
Saunasto's gold list spans 27 countries. Browse another, or jump to the global index.
The iOS app is free. Curator's Picks are highlighted. Pro adds proximity alerts when you're near a saved venue.