Yumo.to – Comprehensive Japan-wide onsen map with detailed filters

Summary: Yumo.to is a searchable map featuring 19,652 onsens across all 47 Japanese prefectures, integrating multiple data sources. It allows filtering by tattoo policy, price, opening hours, access, and water chemistry, with listings linked to original data sources.

What it does

Yumo.to merges national, prefecture, municipal, OSM, and water-chemistry datasets into one platform, enabling users to search onsens by location and apply filters for tattoo access, pricing, hours, and water data.

Who it's for

It serves users seeking detailed, centralized onsen information across Japan, especially those needing data on tattoo policies and water characteristics.

Why it matters

It addresses fragmented onsen information by consolidating diverse datasets into a single, searchable resource with source attribution for accurate trip planning.