Gero Onsen: Gifu's Smooth-Water Hot Spring Town on the Hida River

Updated October 25, 2026 | By Tokyo Paul

Gero Onsen has a long reputation. Set along the Hida River in Gifu Prefecture, it is traditionally ranked among Japan's three famous springs, alongside Arima in Hyogo and Kusatsu in Gunma. Its water is known as a "Beauty Hot Spring," and the town has footbaths along its walking routes. Hotels lend yukata.

This guide explains the history behind the name, what is special about the water, how to enjoy the baths and the town on foot, and how to soak safely and politely.

Where Gero Sits

Gero is a city in Gifu Prefecture in the Chubu region, and Wikipedia calls it famous for its hot springs. Much of the city lies within Hida-Kisogawa Quasi-National Park. The city covers 851.21 square kilometers, the Hida River and the Maze River run through it, and the volcano Mount Ontake is located within its borders.

The present city was formed on March 1, 2004, when Gero merged with the towns of Hagiwara, Kanayama and Osaka and the village of Maze. Hotels in the city offer large tubs and lend yukata, and inexpensive onsen are located near stations and commercial areas.

A Spring With a Long Memory

Accounts of the spring's beginnings differ, which is common for old onsen. One regional directory says it was discovered during the Engi (901 to 923) and Tenryaku (947 to 957) eras. Another guide places the earliest record in the mid-Heian period, around the Tenryaku era, when a spring was found high on Mount Yugamine; it adds that an earthquake in 1265 silenced the source.

A second origin story is told as local legend. In one account, a white heron seen on the banks of the Hida River led to hot water rising from the riverbed, and the temple Onsen-ji was built to enshrine a Yakushi Nyorai statue found on Mount Nakane. Another telling features an injured white crane healing in the Hida River. These are legends, not documented history.

In the Edo period, the Confucian scholar Hayashi Razan listed Gero with Arima and Kusatsu as Japan's three famous springs. One guide dates this to 1621 and gives the group the name "Three Famous Springs Under Heaven."

The Water Itself

Gero's spring is an alkaline simple spring that is colorless, clear and almost odorless, with a source temperature of 84 degrees Celsius. It is distributed to inns through a shared municipal system. It is locally nicknamed bijin-no-yu, "bath for beautiful skin." One directory gives the pH as 9 or higher, though another guide does not state a pH, so look for the figure posted at the bath you visit.

Walking the Town: Footbaths and Public Baths

Sights and hotels are close enough to explore on foot from JR Gero Station on the JR Takayama Main Line. The hot spring town runs along the Hida River. Nine footbaths are spread along the walking routes, and they are free except those inside paid facilities. Some are reported to be open around the clock.

Public bathing options include three communal baths, one of them an outdoor bath. Named public facilities include Shirasaginoyu, Sachinoyu and Curegarden Open Air Bath. Hours, holidays, admission and credit card acceptance vary by facility, so check each one before heading out.

By the river, one directory describes a free "fountain pond" that bubbles up from the Hida River riverbed, and another guide lists Funsenchi, an open-air pool built into the riverbank beside the central bridge. Swimsuits are required for both men and women at these riverside pools.

For those who like to sample different inns, a pass called Yu-meguri Tegata grants bathing at three participating ryokan, and holders keep the wooden pass as a souvenir. Prices and participating inns change, so ask at the tourist association or at an inn.

Sights, Snacks and the Gassho Village

The Chaplin Statue is a popular photo spot, and the Gero Onsen Museum is within walking distance. Gero Onsen Gassho Mura, an open-air village on the southern edge of town, has ten gassho-zukuri farmhouses relocated from Shirakawa-go, and the directory lists it as nearby. Check the distance from your inn before deciding whether to walk, since the directory and another guide describe its location differently (nearby versus the southern edge of town).

Food stalls add to the stroll. Takeout sweets such as parfaits and puddings made with local ingredients are sold only at Gero Onsen, and a nearby takeout shop sells Hida beef in sushi and croquettes. The Ideyu Morning Market, held near the village entrance, runs on a seasonal schedule: one source says daily from March to December, another says early March to late November, so confirm the dates before planning a morning around it.

Through the Seasons

Gero has a humid climate with hot summers and mild winters according to Wikipedia, with an average annual temperature of 12.2 C, August as the warmest month at about 24.5 C on average and January the coldest at about 0.3 C. Average annual rainfall is 2,440.3 mm, with July the wettest month.

A visitor guide lists the seasonal scenery as cherry blossoms in spring, fireworks in summer, autumn foliage and winter snow. In the colder months, see the safety notes below for cold-season precautions.

Getting There

From Tokyo, one guide describes riding the Tokaido Shinkansen to Nagoya Station, about 100 minutes, followed by the limited express Wide View Hida for about 90 minutes to Gero Station. Hida-Takayama is about an hour north of Gero by train. Timetables and fares change, so check the operators before traveling.

Onsen Bathing Safety Notice

Hot springs are relaxing, but hot water places real demands on the body. The Japan Onsen Association gives the following guidance, which applies at Gero as anywhere:

Avoid bathing right before or after a meal, or after drinking alcohol, and skip bathing when tired.
Wait at least 30 minutes after exercise before entering the water.
Elderly people, children and people with physical disabilities should not bathe alone.
Pour water over the body first, starting with the extremities, and drink a glass of water before and after bathing.
People with high blood pressure or heart disease should avoid water above 42 C, and anyone with a medical condition should consult a doctor before bathing.
Stand up slowly, and if you feel faint, leave the tub slowly and ask someone nearby for help.
Short sessions are best for newcomers: about 3 to 10 minutes at a time, once or twice a day.

Wikipedia adds that people with open cuts, sores or lesions should not bathe, and that bathers should keep their heads out of the water. This advice is general information, not medical advice.

Bathing Etiquette in Brief

Japan's Ministry of Land, Infrastructure, Transport and Tourism multilingual database lists these manners: wash thoroughly before entering, keep towels out of the bath water, never take photos inside the bathing area, remove shoes before the changing area, do not wear swimwear in the bath (outdoor pools such as Funsenchi are an exception because swimsuits are required there), and keep the bath quiet with no swimming or splashing. People with tattoos may be refused at some facilities, and small tattoos may be covered with skin-colored waterproof stickers where the facility permits. Hair should be kept up and out of the water.

Quick Reference

Which springs rank with Gero? Arima and Kusatsu.

What is the water type? Alkaline simple spring, with a source temperature of 84 degrees Celsius.

Which station serves the town? JR Gero Station on the JR Takayama Main Line.

Are swimsuits needed at the riverside pool? Yes, for both men and women.

Keep Exploring

If hot spring towns are on your list, Tokyo Paul's Onsen Towns: A Japan Hot Spring Travel Guide is described on Amazon as a practical guide to choosing towns, booking a ryokan, and soaking with tattoo concerns in mind. See Onsen Towns on Amazon