Japanese onsen have a clear etiquette, and following it is what makes the experience serene for everyone. Here’s the short version:
- Wash first. Shower thoroughly at the washing stations before entering any bath. This is non-negotiable.
- No swimwear. Traditional onsen are nude and gender-separated. Bring a small towel for modesty on the walk over — it never touches the water.
- Tattoos: many traditional baths still decline tattooed guests. Private family baths (kashikiri) at ryokan are the workaround — book ahead.
- Keep it quiet. Onsen are for unwinding, not social hour. Low voices, no splashing, no photos. Ever.
- Rinse between baths if moving between pools, and hydrate — hot water plus heat sneaks up on you.
When in doubt, watch what the locals do for thirty seconds. You’ll pick it up instantly.