
Hirayu Onsen — photo: 663highland · CC BY 2.5 · Wikimedia Commons
Search for an onsen in Takayama and you get a list of hotels near the station with a bath on the top floor, mixed in with mountain villages an hour away. Both are real, but they are not the same thing. The short answer: the old town of Takayama has hot spring water from drilled wells, piped to its hotels, and it is not hot at the source. The hot water, some of the hottest in central Japan, is up in the Okuhida valleys to the east and down the railway at Gero. This guide goes through what is where, with the numbers.
Our records hold 1,538 onsen across Japan, 55 of them in Gifu Prefecture. Ten have an address in Takayama City. That sounds like a lot for one town, but Takayama City is huge: in 2005 it absorbed the surrounding towns and villages and became the largest city in Japan by area, reaching east to the Nagano border. Most of those ten are mountain villages, not part of the town you visit.
The one in the town itself is Hida Takayama Onsen (飛騨高山温泉), recorded as a bicarbonate spring. We have no temperature for it. Japanese travel guides describe it as several drilled sources whose water is piped to about forty hotels and inns, and put the water at around 30 to 35 °C, which means it is heated before it reaches the bath.
Measured in a straight line from Takayama Station, the nearest onsen in our data with coordinates is Nagareha, 18.5 km north in Hida City, a simple spring. The first one recorded at 42 °C or more, roughly the point at which a bath can run without a boiler, is Wariishi, a sulfur spring 25.2 km north. The Okuhida villages start at 26.5 km.
Many hotels and inns around Takayama Station and the old streets advertise 天然温泉 (tennen onsen), natural hot spring water. That is the Hida Takayama water, and it is legitimate. For a soak after a day of walking the old streets and the morning markets, it may be all you need. But you are bathing in a hotel, not an onsen town: there is no street of public baths, and most of these baths are for guests only. A few hotels also open their baths to day visitors.
If the water matters to you, look for the spring analysis board near the changing room. It says what the water is, its temperature at the source, and whether it is heated, has water added or is recirculated. How to read it is in onsen vs sento and how hot onsen water is.
Okuhida (奥飛騨温泉郷) is five villages in the valleys under the Northern Alps, all inside Takayama City and all reached by Nohi Bus from the bus centre next to Takayama Station.
Hirayu works as a day trip: an hour each way, a bath, lunch, and back to Takayama for the evening. The other villages are better as a night. Several Okuhida inns have large riverside outdoor baths, and some are mixed; see mixed bathing if that matters to you.
Two smaller ones inside Takayama City are closer by bus but cool at the source. Hida-Nyūkawa, about 40 minutes by local bus, is recorded at 33.3 °C and pH 7.3, bicarbonate and sulfur, with one inn. Akigami, about an hour by bus to the south-east, is recorded as bicarbonate, with no temperature on record.
Gero, 36.8 km south of Takayama in a straight line, is the easiest hot water without a bus. It is on the same JR Takayama Line, under an hour on the Limited Express Hida, and the inns start a few minutes' walk from Gero Station. The source is recorded at 84 °C and pH 9.0, a simple spring: clear, hot and slippery on the skin. The JR Pass covers the train. Many people stop in Gero for a night on the way between Nagoya and Takayama rather than going back for it; our Gero guide has the public baths and the bath pass.
Shirahone, the milky sulfur village, is 33.8 km east of Takayama in a straight line, but it is on the Nagano side of the ridge, and without a car it is a long way round, by bus through Hirayu. Our Shirahone guide has the connections. If your route goes on to Matsumoto, a night in Hirayu on the way is the natural break, and our Japanese Alps guide picks the three onsen near Matsumoto.
Some searches for "Takayama onsen" are for somewhere else. There are two villages called Takayama with hot springs of their own, and their water is hotter than the town's.
If you are booking a bath, check the prefecture: Gifu is the old town with the morning markets, Nagano and Gunma are the villages.
Bus times are rough estimates from our data, not a timetable, and the mountain buses run less often than the trains. Check the current Nohi Bus times before you plan a day trip, especially in winter, and keep an eye on the last bus back to Takayama.
Hotel baths are usually for guests only; ask at the front desk before you assume you can come in for a day bath.
Tattoo rules are set by each bath, not by the town. See going to an onsen with tattoos and check with each place. And the rules are the same in a hotel bath as in a mountain inn: wash first, keep the towel out of the water. Onsen etiquette has the full list.
For the same question in other cities, see onsen in Tokyo, onsen in Kyoto and Osaka and onsen in Nagoya. Coming up from Nagoya? See the three best onsen near Nagoya. Going on to Kanazawa? See the three best onsen near Kanazawa. For a bath without staying the night, see onsen day trips.