The Onsen Map: Hot Springs

Search hot springs, sento, day-use onsen, and bathing facilities across Japan by location, map, prefecture, facility type, spring type, reported benefits, day use, and lodging.
Find nearby baths or plan onsen stops for your next trip, with facility details and directions in one app.

【Main Features】

■ Search by spring type and reported benefits
Search by sulfur springs, chloride springs, bicarbonate springs, and other spring types, plus benefit and reference information registered for each facility.

■ Personalized Onsen Search
Combine preferences such as what you want to address, prioritized benefits, and spring type to view matching facility candidates.

■ Medication × Onsen Care Guide
Developed under pharmacist supervision, this guide lets you check bathing precautions by medication ingredient.
Scan a medication notebook or medication-information image with the camera or gallery to show candidates that match registered ingredients. OCR does not auto-confirm a medicine; only candidates you select can be saved.
Online OCR sends the selected image to Google Cloud Vision for text recognition. You can choose on-device OCR instead. The app does not save OCR images or full OCR text.

■ Weather around each facility
From a facility detail page, check the current weather and a 15-day forecast for the surrounding area.
View conditions, highs and lows, precipitation probability, and more. Some long-range forecasts also show a forecast-confidence indicator.

■ Map and current-location search
Browse nearby facilities and destinations on the map.
Check your location, select facilities, and use “Search this area” while moving around the map.

■ Advanced filters
Combine prefecture, facility type, spring type, reported benefits, day-use availability, overnight stays, non-sento facilities such as saunas and super sento, and more.

■ Onsen Stamp Book
Record an onsen stamp at facilities you visit and keep a history of your onsen trips.

■ Facility information
Check addresses, phone numbers, spring types, reported benefits, official websites, and more.
Save facilities to Favorites and revisit them from your browsing history.

■ In-app directions
Check routes from your current location to a facility. Switch between driving and walking and view estimated distance and travel time.

■ Design themes
Choose from Japanese Modern, Simple, and Cyber themes.
Change the look of search screens and onsen facility pin badges on the map.
Some features, including the Cyber theme and Ad-Free Plus, require an in-app purchase.

【Recommended when you want to】
・Find nearby day-use hot springs or sento
・Discover onsen at a travel destination or along a drive
・Compare spring types and reported benefits
・Check bathing precautions related to medication
・Check the weather around a facility before heading out
・Find an onsen ryokan or onsen hotel
・Save facilities and review them later
・Keep a record of your onsen trips

Find your onsen with The Onsen Map.

【Important Information】
Facility information is compiled from official facility information, public information, and other sources, but hours, prices, equipment, day-use/overnight availability, bathing conditions, and other details may change. Check official information before visiting.
Spring-type, reported-benefit, and Medication × Onsen Care Guide information is provided for reference. This app is not a medical device and is not intended to diagnose, treat, cure, or prevent any medical condition. If you need guidance about your health, medication, or whether bathing is appropriate, consult a physician, pharmacist, or other qualified healthcare professional.
Weather information is for reference only. For safety-related decisions, do not rely solely on the app; check official weather and disaster-prevention information from the Japan Meteorological Agency, local authorities, or other official sources.
Current-location features require location services and permission.