The Japanese onsen ritual is among the world's most refined wellness traditions. The luxury hotels that combine onsen with hospitality create something irreplicable.
What an onsen is
A natural hot spring. Mineral-rich (sulphur, iron, sodium). Geothermally heated. Believed to have therapeutic properties for skin, circulation, and inflammation.
The traditional ritual: rinse before entering, soak (5-10 minutes), rest (10 minutes), repeat. No swimsuits, onsens are nude. Single-sex bathing typically.
Traditional ryokan
Gora Kadan Hakone
Imperial family connection. Luxury ryokan with hot spring infrastructure. From $1,000/night.
Beniya Mukayu Yamashiro
Private outdoor onsen attached to each room. Yamashiro hot springs.
Asaba Shuzenji
Traditional ryokan with bamboo grove and onsen.
Hoshinoya Kyoto
Newer luxury Hoshino Resorts property. Riverside onsen.
Hoshinoya Karuizawa
Mountain ryokan with hot springs.
Kai Kawaji
Hoshino's smaller ryokan brand. Multiple onsen-rich properties.
Modern hotels with onsen
Aman Tokyo
Pool-and-onsen complex on the 33rd floor.
Aman Kyoto
Garden-set onsen.
Park Hyatt Niseko
Ski-resort onsen.
Hyatt Regency Hakone Resort and Spa
Modern hotel with onsen integration.
How the night works
Arrive in the afternoon. Tea ceremony. Change into yukata robe. Pre-dinner onsen. Multi-course kaiseki dinner. Post-dinner onsen. Sleep on futons. Morning onsen. Breakfast.
The pace is slow. The night is the trip.
Onsen etiquette
- Always wash before entering, soap, rinse, repeat
- No swimsuits
- Tattoos: many ryokan exclude tattooed guests, though luxury properties often accept
- Quiet conversation only
- Phones forbidden in onsen
- Stay 5-10 minutes per soak, rest, repeat
Five rules
- Stay 2 nights minimum, first night is settling
- Multiple onsen sessions per day is the point
- Tattoo coverage tape works at most luxury ryokan
- Pre-book kaiseki dinner timing, 6-7pm typical
- Bring nothing, yukata and slippers provided
For more, see the wellness pillar.
Frequently asked questions
Last updated May 16, 2026
What is an onsen and how is it different from a regular hot spring?
An onsen is a hot spring designated by Japanese law, water sourced from naturally heated geothermal sources at 25°C+ at the source, containing specific minerals. The legal designation (separate from generic hot springs) is administered by Japan's Ministry of the Environment. Most ryokans built before 1990 in onsen towns hold formal onsen designations; some modern luxury hotels have built or acquired adjacent onsen sources to qualify. The distinction matters culturally, onsens are an institution in Japanese hospitality, not a generic spa amenity.
Which Japanese hotels have the best onsens?
Aman Kyoto (private indoor and outdoor onsens with garden views), Hoshinoya Karuizawa (forest onsen with traditional bathhouse architecture), Hoshinoya Kyoto (riverside onsen accessible by boat only), Hakone Tsubaki (one of the most architecturally distinguished modern ryokans), Gora Hanaougi (Hakone, with private onsen-suite combinations), Kayotei Yamanaka (traditional Kaga onsen district), and the historic Kinosaki ryokans (Mikiya, Nishimuraya Honkan). Aman Kyoto is the most accessible top-tier onsen for international guests; the historic ryokans require Japanese-language-comfortable navigation.
Should I stay in a ryokan or a hotel with an onsen?
Ryokan for the full traditional experience, kaiseki dinner (multi-course tasting), futon bedding on tatami, yukata robes, communal onsen bath after dinner, single-establishment service. Hotel with onsen for the contemporary version, Western beds, restaurant choices, more flexible operating hours. For first-time visitors: ryokan for 1, 2 nights to absorb the format, hotels with onsens for the remainder of the trip. Many Aman, Park Hyatt, and Hoshinoya properties blend the two formats in different proportions.
What are the onsen rules and etiquette?
Wash thoroughly at the seated shower stations before entering the bath. No swimsuits, onsens are nude (separated by gender at most baths). Long hair must be tied up. No photos, no phones in the bath area. Tattoos are forbidden at most traditional onsens (changing slowly at international-facing hotels, Aman Kyoto and Hoshinoya properties have private onsens that bypass this rule). The bathhouse is for soaking and silence, not conversation.
Are onsens open to non-residents at hotels?
Some yes, most no. Day-use onsen access at luxury hotels (Aman Kyoto, Hoshinoya) is generally not available, bath access is reserved for overnight guests. Public-bath onsens in traditional onsen towns (Hakone, Kinosaki, Kusatsu, Beppu) operate independently of any hotel and offer day passes typically ¥800, ¥2,000. The distinction matters when planning multi-stop Japan trips, public-bath access lets you experience multiple onsen waters without rebooking.
