Category: Onsen, Etiquette, Shrines, Temples & Cultural Experiences · Tool #145 of 200
2026/2027 reference benchmarks
| Option / Scenario | 2026/2027 Benchmark |
|---|---|
| Sulfur / Acidic Spring — Kusatsu, Noboribetsu, Hakone Owakudani (pH 1.5–3 · tarnishes silver!) | Type #1 |
| Sodium Bicarbonate (Bijin-no-Yu) — Kurokawa, Ureshino, Gero (pH 8–9 · silky for dry/sensitive skin) | Type #2 |
| Chloride / Salt Spring — Atami, Wakura, Shirahama (warms core, prevents post-bath chill) | Type #3 |
| Iron / Carbonated Spring — Arima Onsen Kinsen & Nagayu (deep muscle recovery) | Type #4 |
| Day-use bathhouse + rental towel fee (¥) | 1,200 |
Frequently asked questions
How does the Onsen Water Mineral Type work?
Pick your scenario from the dropdown and enter your numbers—the calculator immediately computes your tailored result and compares it against skin & jewelry advice + post-soak rinse rule in JPY, USD, EUR, or GBP.
Are these 2026/2027 Japan figures and rules accurate?
Yes—all reference values are based on published 2026/2027 Japanese rail, ministry, weather, and retail benchmarks. Always confirm final seasonal schedules or rates with the official operator.
Can I share my exact calculation on Reddit or with travel companions?
Yes! Use the "Copy My Exact Result Link" or "Copy Reddit Markdown Table" button below the output to share your exact pre-filled scenario.
Can I embed this calculator on my blog or travel website?
Yes—copy the responsive iframe snippet in the Share & Embed box below at zero cost.