Yuchelin

Yuchelin (Yushuran, 湯シュラン) is a rating for onsen built around the water, as it arrives in the tub. Other rankings help you choose an inn by its food, its hospitality, its views, its architecture or its rooms; Yuchelin rates the water itself, how it is delivered and looked after, and the landscape, history and culture around it. The organizers explain it with a fish: the source is the fish swimming in the sea, and the water in the tub is the fish dish on the table. However good the fish, how it is carried, kept fresh and cooked changes the taste. Water straight from the source isn't treated as an absolute standard, either: each spring is weighed against its own temperature, flow and setting.

It is run by Yuchelin, a general incorporated association in Tokyo, led by onsen specialist Kitade Kyoko (北出恭子). It has no connection with the Michelin Guide. Its first award was held on October 26, 2026, with the backing of Japan's Ministry of the Environment, and it plans to survey more onsen from 2027.

This page gathers every place Yuchelin has certified, grouped by stars in the Places tab and shown on the map. It grows with each award.

What gets judged

Every bath is judged on five criteria:

• Character of the water: its components, pH and temperature, and what you actually meet in the tub: its colour, smell, taste and feel on the skin.
• Freshness and delivery: how far and how long the water travels from the source to the tub, how it is piped, whether it is stored on the way, and whether it is diluted, heated, filtered and recirculated or disinfected.
• Rarity: the geology behind the spring and how it emerges, its character, the ways of bathing in it and its setting: what only this place has.
• Safety and hygiene: cleaning and hygiene in the tubs and the bathhouse, safety measures while you bathe, and keeping to the relevant laws.
• Environmental and cultural value: the landscape and care for the environment, the local history and culture, and the people who look after the water and pass it on.

A bath goes through four steps: the organizers gather its water analysis, facility records and how it is managed, an inspector visits, an evaluation committee reviews it against the criteria, certifies it and decides its stars, and the result is published. Facilities pay nothing to be evaluated, and the association does not accept sponsorship from facilities that could be rated, their operators, or local governments and organizations with a direct stake in the result.

A board of trustees oversees the system and advises on it: specialists in onsen science, onsen medicine, public health, tourism, history and culture, and regional development. Its members are onsen critic Ishikawa Michio (石川理夫), professors from Kyorin and Tokai Universities, a professor emeritus of the International University of Health and Welfare, the head of research at the Chuo Onsen Kenkyujo (中央温泉研究所), a research specialist at Nagoya University and a fellow of JTB Tourism Research and Consulting, with an adviser to the Chuo Onsen Kenkyujo as observer. The board watches that the criteria, the selection process and the way the system runs are fair and open, and takes no part in selecting, surveying, judging or certifying individual facilities.

The stars

• ⭐⭐⭐ Three stars: "a bath experience that could change your life". The top rating, for an outstanding bath where the water's exceptional qualities and rarity, the way it is delivered and the character of the place all come together. Meeting it can stay with you enough to change how you think about onsen.
• ⭐⭐ Two stars: a famous bath worth travelling to for the water itself. The water's own value stands out, and it is delivered in a way that does it justice, so that soaking in it is reason enough for the trip.
• ⭐ One star: a bath worth stopping at if you are nearby. Water with the character of its own place, used with care, and well worth a soak when you are in the area.

The stars, Yuchelin says, are about what a bath is worth visiting for, and are not meant to show simply which bath is better. They are a label of trust, there to convey the water's value, protect it and pass it on.

How it started

The organizers call 2026 their "founding year zero". So that people could first get to know model cases, the first award certified three stars only: 21 facilities, chosen as especially rare facilities whose water's character is easy to feel with all five senses. Yuchelin calls them a first step in introducing great baths from across the country. Two- and one-star certifications start in 2027, and the inspectors, who as a rule visit without saying who they are, go into full operation in fiscal 2027. New stars will join this page as they are announced.

Part of the funding came from crowdfunding on CAMPFIRE, which ran from September 24 to October 20, 2026 and closed at ¥6,493,026 from 432 backers, 576% of its first goal.

Visiting

Yuchelin asks visitors to "borrow the water" with care, in five rules put together under the supervision of the Touristship association. Many of the certified baths, it notes, are places local people have looked after as part of daily life, so it asks you to come in the spirit of o-jama shimasu, "excuse me for intruding". Before you go: check the facility's page for whether it is open and call if you need to, bring cash and coins, a towel, soap and shampoo, and a white cup, and keep your group small enough for the size of the bath. Yuchelin doesn't say why the cup should be white; our guess: it shows the water's real colour, and lets you taste it where drinking is allowed.

Then the five rules, a good habit anywhere: let the locals go first, and stay away at the busy hours; say hello; enjoy the water at whatever temperature it is that day, and ask a local before you adjust it; do the basics properly (no photos in the bath or changing room, rinse and wash before you get in, don't hog the spout or the washing spot, wash and put back the bucket and stool, take your rubbish home, dry off before the changing room); and treat the water, a gift of the earth, with gratitude and respect.

Some of the 21 are small communal baths, and some open only on certain days. Check opening days on each place's page here before you go.