Onsen in Japan: Popular Hot Spring Towns, How to Bathe and Private Baths

An onsen is a natural hot spring that people in Japan have used for relaxation for hundreds of years. Each hot-spring town has its own character: some are riverside towns where guests stroll in yukata after dinner, others sit deep in mountains under heavy winter snow. This guide focuses on matching a town and lodging to the time you have, how to use an onsen politely, and the questions Thai travellers often ask about tattoos and private baths.

Picking a town quickly

If time is short, pick a town reachable directly from a big city. Near Tokyo there is Kusatsu Onsen in Gunma Prefecture, with a hot-spring centrepiece in the middle of town, and Hakone in Kanagawa. Near Osaka there is Kinosaki Onsen in Hyogo, a riverside town known for strolling between several public bathhouses, and Arima Onsen near Kobe, which is easy to reach from the big cities.

Comparing onsen towns

Getting there and staying near transport

Many onsen towns are not at a big station, so check whether trains or buses run directly from the main station and when the last one leaves. For an overnight stay, a shuttle from the station offered by some ryokan helps a lot, but you may need to request it. Check-in is usually in the afternoon, so leave time to stroll before dinner.

Budget-friendly options

If you do not want to pay full ryokan rates, stay at an ordinary hotel in town and visit public baths on a day-use basis. Many towns have public baths that open at set hours, or combined passes for several baths, which are better value if you bathe in several. Season and holidays affect room rates, so book early and compare sources.

Familias y grupos

Families with small children should ask about shared baths and child policies before booking, since some places have age limits. Many Japanese-style rooms take four or five people, and a private bath in the room or a reservable private bath lets a family soak together without worrying about the men's and women's split, since shared baths are separated by gender.

Ryokan with private baths and tattoos

Ryokan with private baths, such as an open-air bath attached to the room or one rented by the hour, suit couples, families and guests with tattoos because shared baths are not needed. Check whether the bath is included in the room rate or charged extra, and whether you must reserve a time. As for tattoos, not every place bans them: some allow small ones covered with a patch, while others refuse entirely, so ask directly before booking.

Etiquette and cautions

1. 1Wash before enteringWash thoroughly with soap at the washing station before entering; never get in with soap or lotion on.
2. 2Towels and hairKeep the small towel out of the water, on your head or the edge, and tie long hair up.
3. 3Hydrate and restDo not soak too long, especially after eating. Drink water before and after, and consult a doctor if you have a health condition.

If you are looking up an onsen town, checking train times or confirming a private bath on the way, an eSIM lets you use maps and confirmation emails without relying on station Wi-Fi.

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