Sanage Onsen: Hot Spring Guide & Visitor Access (Aichi)

Sanage Onsen rises in the hills of Kano-cho, Toyota City, Aichi, within the Aichi Kogen Quasi-National Park. Drawn from deep underground, it is one of the prefectures largest natural radon springs and has been called a medical spring. It is also known as the first hot spring in Aichi permitted for drinking, so the water can be enjoyed both in the bath and as a drink.

Highlights

• A weakly radioactive spring containing natural radon, said to be rare nationwide
• The first spring in Aichi licensed for drinking, to be enjoyed by the cup
• Kinsen-no-yu, a day-use facility with a calm Japanese-style bathing space
• A quiet mountain setting embraced by the Aichi Kogen Quasi-National Park

Enjoying the Seasons

Set in the hills, it offers cool, leafy shade in summer and surrounding autumn colors in fall. Winter is a season to heal slowly in the warming water amid clear air, and spring brings fresh greenery for a soak paired with a forest walk. The quiet setting can be enjoyed all year round.

Access and Basic Information

• Location: Kano-cho, Toyota City, Aichi Prefecture
• A free shuttle bus runs from Fujigaoka Station on the Nagoya Municipal Subway Higashiyama Line; about 15 minutes by taxi from Shigo Station on the Aichi Loop Railway
• By car from interchanges on the Tokai-Kanjo Expressway
• Spring quality: radioactive (natural radon) hot spring, one of the prefectures largest natural radon springs whose components are said to be taken in by bathing, drinking, and inhaling
• The day-use facility Kinsen-no-yu is open from morning to late at night, with adult bathing around a thousand yen and up (fees and hours may change, so check official information)
• Free parking makes it convenient to arrive by car

Practical Travel Notes

• Best season: the fresh greenery of spring and the colors of autumn make the surrounding nature beautiful, pairing a soak with a forest walk; summer is cool and winter invites a quiet cure-style stay
• Best time of day: to savor the mountain quiet, a relatively empty weekday daytime is best
• Avoiding crowds: the day-use facility gets busy on weekends and holidays, so an early-morning visit is more relaxed
• Time needed: two to three hours for the baths at Kinsen-no-yu, suiting both a stop on a drive and a longer stay
• Nearby real spots: the hills of the Aichi Kogen Quasi-National Park, with Sanage Shrine and Korankei among Toyota Citys nature and sights within driving range
• Budget sense: day-use bathing is around a thousand yen; some facilities offer drinkable source water, with details available on site

A Quick Tip

A day-use facility makes this an easy stop on a drive. The drinkable source water can sometimes be taken home, so ask on site about the details. A free shuttle bus runs from Fujigaoka Station, so it is easy to reach even without a car.