Yōrō-keikoku Onsen — photo: 白蛇の騎士 · CC BY-SA 3.0 · Wikimedia Commons
The 3 best onsen in Chiba
If you want one onsen in Chiba, the three to look at are Yōrō-keikoku, Shirako and Kameyama. All three are reached by train with a short walk or a local bus, and of the 21 onsen in Chiba in our data they are the three best known. Yōrō-keikoku and Kameyama are in the green hills in the middle of the Bōsō Peninsula, about an hour and a half from Tokyo; Shirako is on the Pacific coast, about two hours. Before you pick, know one thing: no spring in Chiba comes out of the ground hot.
Why these three, in one paragraph
We did not pick by taste. We took every onsen in our data in Chiba Prefecture, ranked them by how often each town's Wikipedia article is read, as a measure of how established a place is, and kept only the ones you can reach without a car. The full method, with numbers, is at the end.
Chiba in numbers: cool water, reheated
Chiba is the peninsula across Tokyo Bay from Tokyo, and it is the easiest prefecture to reach from the city. It is not a place of famous onsen towns. The best known one in Chiba, Yōrō-keikoku, is only about 200th in Japan in our count of Wikipedia readership.
The water is the bigger difference. Of the 21 Chiba onsen in our data, 15 have a source temperature on record, and every one of them is under 30 °C. The warmest is Kameyama at 29.4 °C. Chiba is the only one of Japan's 47 prefectures where that is true: across the country, about half the onsen with a temperature on record reach 42 °C (573 of 1,167). So in Chiba, expect the bath to be heated. That is normal and legal in Japan: the water is still spring water, it is just warmed up. Our guide to onsen temperatures explains the labels you will see.
What Chiba does have is unusual water. Three of the 13 iodine springs in our data are in Chiba, more than anywhere except Miyazaki, and two of them are in this list. Most Chiba springs are chloride water, old salty groundwater, which fits a prefecture that is mostly coast.
So go to a Chiba onsen for an easy night out of Tokyo, a gorge or the sea, not for steaming water from the ground. If the source temperature matters to you, Gunma or Hakone is the better trip (see the links at the end).
1. Yōrō-keikoku: the gorge in the hills
Why it made it. Yōrō-keikoku Onsen is the best known in Chiba, at 310 in our count. It is about an hour and a half from Tokyo in our travel data, and the station is a short walk from the inns.
The place. A small cluster of inns along Yōrō Gorge, 0.4 km from the river, in wooded hills in the middle of the peninsula. The gorge has walking paths, and Awamata Falls is about 4.4 km away. It is best known for autumn leaves, which come late here, often into early December. Ōtaki Castle is about 8 km away.
The water. Recorded at 19 to 25 °C and listed as chloride and bicarbonate. Cool at the source, so the baths are heated.
Getting there. A JR train to Goi on the Uchibō Line, then the Kominato Railway, a small local line, to Yōrōkeikoku Station. The JR Pass covers the first part only. Trains on the local line are not frequent.
Good for: a quiet night in the hills, autumn colour, walking. Watch out for: it is the busiest in leaf season; check the last train back on the Kominato line; there is little open after dark.
2. Shirako: the Pacific coast town
Why it made it. Shirako Onsen is second at 237. It is about two hours from Tokyo in our travel data, and the only one of the three on the coast.
The place. A spread-out resort town near the long Kujūkuri beach. Many inns here are large, built for groups, and the town is known in Japan for school sports camps, so it can be busy in the holidays and quiet on other days.
The water. Recorded at 29 °C and listed as chloride and iodine spring water. Iodine water often turns yellowish or brownish as it meets the air, so a coloured bath does not mean it is dirty.
Getting there. The JR Sotobō Line from Tokyo to Mobara, then a local bus of about 20 minutes. The JR Pass covers the train, not the bus.
Good for: the sea, a beach walk, an easy JR trip. Watch out for: there is no old onsen street to stroll; the town is spread out, so ask how far your inn is from the bus stop.
3. Kameyama: the lake at the end of the line
Why it made it. Kameyama Onsen is third at 205. It is about an hour and a half from Tokyo in our travel data, and the station is about a ten-minute walk away.
The place. A few inns by Kameyama Lake, a dam lake in the hills, at the last station of a quiet JR branch line. Kururi Castle is about 6.6 km away, and Yōrō Gorge is 7.6 km, so you can see both places on one trip if you have a car or a taxi for that leg.
The water. Recorded at 29.4 °C, the warmest in Chiba in our data, pH 8.2, and listed as chloride, bicarbonate and iodine. Slightly alkaline, which can feel smooth on the skin. Still heated for the bath.
Getting there. A JR train to Kisarazu, then the JR Kururi Line to Kazusa-Kameyama, the end of the line. The JR Pass covers all of it. Past Kururi, the line has only a few trains a day, so plan around the timetable.
Good for: a JR Pass trip, a lake, the quietest night of the three. Watch out for: trains are few; there are few shops or places to eat, so plan on dinner at the inn.
Which of the three?
- Autumn leaves and a walk: Yōrō-keikoku.
- The sea: Shirako.
- On a JR Pass: Kameyama is JR to the end of the line; Shirako is JR plus a bus; Yōrō-keikoku needs a private local line.
- Quietest: Kameyama.
- Hot water from the ground: none of them. Look at Gunma or Hakone instead.
The places that only just missed
Inubōsaki came fourth at 157. It is at the cape on Chiba's eastern tip, by the lighthouse, with sea views, about two hours from Tokyo by JR to Chōshi and then the small Chōshi Electric Railway to Inubō, a ten-minute walk. Recorded at 27 °C, chloride.
Kamogawa (150) would have been fifth, but our travel data does not say whether you need a car for the last part from Awa-Kamogawa Station, so it did not pass the test. It is a sea resort with sulfur water on record. Katsuura (128), on the same coast, is a short bus ride from its JR station, with water recorded at 18 °C.
If you have a car, Shichirigawa (77) in the same hills as Kameyama is the one sulfur spring in Chiba with a temperature on record (15 °C); by public transport it is a taxi from Kazusa-Kameyama.
How we picked these three
- Starting pool: all 21 onsen in our data in Chiba Prefecture.
- No car needed: 14 of the 21 are marked in our travel data as reached by train and a short walk or a local bus. Three need a taxi from the station, three have no answer on whether a car is needed, and one, the South Bōsō onsen villages, is a group name with no travel data. We kept the 14.
- Known: we ranked the 14 by how often each place's Wikipedia article is read. Yōrō-keikoku 310, Shirako 237, Kameyama 205, then Inubōsaki 157, Katsuura 128 and Shirahama (Chiba) 115. Kamogawa (150) was not in the 14.
- Not used: views, inn quality, price, tattoo policy, food or private baths. We have no data that ranks those fairly, so we did not pretend to.
- About the water: 15 of the 21 have a temperature on record, all under 30 °C, the highest 29.4 °C at Kameyama. The water did not decide the ranking.
- Travel times are rough estimates from our data. Check the current timetable before you go.
For every onsen within reach of Tokyo, see onsen near Tokyo and our guide to onsen trips from Tokyo. Want the best three around Tokyo as a whole? See the best onsen near Tokyo. Other prefecture picks: Gunma and the Izu Peninsula. Flying from Narita? See onsen near Japan's airports. For towns you can reach by train, see onsen you can reach without a car and onsen on the JR Pass. What do "chloride" and "iodine" mean? See onsen water types. New to this? Start with how an onsen stay actually works and onsen etiquette. Tattooed? Read going to an onsen with tattoos before you book.