O-yu (Nozawa outer bath)

Symbol of the 13 village-run public baths — free, and hot

Nozawa Onsen is a mountain village in northern Nagano where some thirty springs rise naturally, famous for a unique culture in which resident guilds called yu-nakama have for generations maintained and cleaned the village’s 13 communal baths and opened them free to visitors. O-yu is the symbolic heart of it all — a timber bathhouse with a karahafu gable in Edo style, the village landmark. Inside are just two tubs, hot and “mild”, but because 66 °C sulphur water flows in undiluted, even the mild side exceeds 42 °C and the hot side may top 45 °C — locals call it “Nozawa’s baptism”. Etiquette: drop a thank-you coin in the box, wash before entering, and never run cold water without asking the locals. It is the only public bath with a footbath outside, a gentle start if the heat worries you. In ski season it fills with Australian and other Western skiers, so foreigners are a familiar sight and tattoos are generally tolerated.

Tips & cautions

- Very hot. Douse yourself thoroughly, enter slowly, stay 1–2 minutes at a time; get out at the first sign of dizziness.

- Ask locals before using the cold hose, and only briefly — never leave it running.

- No soap, shampoo or towels; washing space is tight, so long showers are bad form.

- No late-night bathing (closes 23:00); from 06:00 in winter.

- In peak periods (New Year, February) notices may give residents and lodgers priority.

- No photography. Sulphur can taint swimwear and jewellery (silver tarnishes).

- For gentler water among the 13, try Kuma-no-tearai-yu (40 °C) or Ma-yu (greenish cloudy water).

Getting there

Nozawa Onsen Liner bus ~25 min from Iiyama Station (Hokuriku Shinkansen) to “Nozawa Onsen”, then 5 min on foot to the village centre (Toyosato 9328, Nozawaonsen-mura). ~2 h 30 min from Tokyo by Shinkansen and bus. Direct bus ~75 min from Nagano Station. By car ~25 min from Toyota-Iiyama IC; use village pay parking.