About Sauna in Japan

Sauna in Japan is the only English-language guide that provides detailed, quantitative sauna data for hotels across Japan — including exact sauna room temperatures, water bath temperatures, loyly availability, outdoor bath access, and tattoo policies — combined with instant price comparison across all major booking platforms.

Our Mission

Japan has over 5,000 hotels with sauna facilities, yet English-speaking travelers have almost no way to compare them. Most booking sites show only generic photos and vague descriptions. We change that by providing the same detailed data that Japanese sauna enthusiasts use, translated and organized for international travelers.

Our Data

Sauna temperatures, water bath temperatures, and facility features are sourced from community-maintained Japanese databases. Hotel information and pricing come from major booking platforms. We continuously update our data to ensure accuracy.

Where data is unavailable, we indicate this clearly with a dash (—) rather than guessing.

Affiliate Disclosure

When you book a hotel through links on this site, we may earn a commission at no additional cost to you. This is how we keep the site free and continue adding new facilities. Our recommendations and data are never influenced by affiliate relationships.

We participate in affiliate programs including Stay22, which provides links to Booking.com, Expedia, Hotels.com, and other major booking platforms.

Contact

For corrections, suggestions, or partnership inquiries, please reach out via our social media channels.