Chiba · Pacific Coast & Boso Peninsula Onsen / 千葉 / 房総半島の海岸温泉と渓谷の湯

Chiba Onsen Guide

Top hot springs, ryokan, and day-use baths in Chiba — bilingual guide for travelers.

千葉のおすすめ温泉地・温泉宿・日帰り温泉を厳選紹介。

Chiba's coastline bends some 270 km around the Boso Peninsula, forming one of Japan's longest seaside-onsen corridors — yet the nearest hot springs sit barely 90 minutes from central Tokyo. Because the warm Kuroshio Current sweeps the eastern shore, Boso winters stay mild enough for flower fields to bloom in January, and the coast catches the Pacific sunrise full in the face: many ryokan baths are angled deliberately east so you can watch the sun lift straight out of the ocean from the water. The mood is the opposite of crowded Hakone — slow fishing harbours, a 430-year-old morning market, a peat-dark gorge spring inland, and lighthouse capes at the peninsula's southern tip. Most of the water is sodium-chloride brine, the classic warming "hot spring of the sea."

千葉県は房総半島をぐるりと囲む約270kmの海岸線に沿って、日本有数の長さの「海岸温泉ベルト」を形成しています。それでいて最寄りの湯は東京都心からわずか90分ほど。東岸を暖かい黒潮が洗うため房総の冬は穏やかで、1月から早咲きの花畑がほころび、海岸は太平洋の日の出を正面から受け止めます——多くの旅館の浴場はあえて東向きに造られ、湯船から海上に真っ直ぐ昇る朝日を眺められます。混雑する箱根とは対照的に、のんびりした漁港、430年続く朝市、内陸の黒湯の渓谷温泉、半島最南端の灯台岬が点在。湯のほとんどは、体を芯から温める塩化物泉——いわば「海の湯」です。

5 Top Onsen in Chiba

Where to soak

千葉のおすすめ温泉地・温泉宿 5選

Kamogawa Onsen (鴨川温泉)01

Kamogawa Onsen

鴨川温泉

Pacific sunrise from your ryokan bath

太平洋の日の出を浴びる、外房屈指のリゾート温泉

SpringSodium chloride spring塩化物泉
Fromfrom ¥16,000 / night
SourceFree-flow (kakenagashi) per public info/ 源泉かけ流し(公式情報)

Kamogawa stretches along the eastern, outer-Boso coast, where the warm Kuroshio Current pushes Pacific water right up to the beach and keeps the winters gentle. The ryokan here are built around the sunrise: many east-facing baths open before 6am so guests can soak while the sun climbs straight out of the ocean. The town's best-known attraction is Kamogawa Seaworld, a large marine park famous for its orca and dolphin shows — an easy, fun pairing for families. Reach it in about two hours from Tokyo Station on the Wakashio limited express, or by car across the Tokyo Bay Aqua-Line. The water is a warming sodium-chloride spring.

  • Pacific sunrise views from morning baths
  • Kamogawa Seaworld nearby — family-friendly
  • ~2 hours from Tokyo Station by Wakashio express

Hours and prices vary — always confirm on the official site before visiting.
営業時間・料金は変動するため、必ず公式サイトでご確認ください。

Yoro Onsen-kyo (養老渓谷温泉郷)02

Yoro Onsen-kyo

養老渓谷温泉郷

Inland gorge onsen with foliage and waterfall

紅葉の渓谷と粟又の滝、千葉唯一の渓谷温泉

SpringSodium chloride-bicarbonate spring (kuro-yu)ナトリウム-塩化物・炭酸水素塩泉(黒湯)
Fromfrom ¥14,000 / night
SourceFree-flow (kakenagashi) per public info/ 源泉かけ流し(公式情報)

Yoro Gorge cuts through the centre of the Boso Peninsula and is Chiba's only true mountain-gorge onsen — a complete change of scenery from the coast. Its signature water is "kuro-yu," a dark, peat-rich moor spring (a sodium chloride-bicarbonate water) that wells up cool, around 13–20°C, and is gently heated; the tea-brown bath feels notably soft on the skin. The star sight is Awamata-no-Taki, a wide waterfall that slides 100 metres down a tilted rock face, framed by maples that colour unusually late — late November into early December, among the last foliage anywhere in the Kanto region. Getting there is half the fun: the single-car Kominato Railway rattles through rice paddies that turn rape-blossom yellow in spring.

  • Chiba's only mountain-gorge onsen area
  • Awamata-no-Taki — 100m slide waterfall
  • Late foliage peak (Nov–Dec) — among Kanto's latest

Hours and prices vary — always confirm on the official site before visiting.
営業時間・料金は変動するため、必ず公式サイトでご確認ください。

Shirahama Onsen (白浜温泉)03

Shirahama Onsen

白浜温泉

Southernmost Boso, lighthouse & flower fields

房総最南端、野島崎灯台と花畑の温泉

SpringSodium chloride spring塩化物泉
Fromfrom ¥14,000 / night
SourceFree-flow (kakenagashi) per public info/ 源泉かけ流し(公式情報)

At the very southern tip of the Boso Peninsula, the white Nojima-zaki Lighthouse has stood since 1869 — one of only eight Western-style lighthouses Japan agreed to build under the 1866 treaty with the U.S., Britain, France and the Netherlands, and designed by the French engineer Verny. You can climb it for a sweeping Pacific panorama. The surrounding Shirahama district is famous for its winter flower fields: stock, snapdragons and poppies bloom from December through April, when most of Japan is still cold, and many farms let visitors pick their own. Ryokan line the rocky shore, several with open-air baths that look straight out to the open sea.

  • 1869 Nojima-zaki Lighthouse — one of Japan's 8 originals
  • Winter flower fields (Dec–April) when Japan is cold
  • Southernmost point of Boso Peninsula

Hours and prices vary — always confirm on the official site before visiting.
営業時間・料金は変動するため、必ず公式サイトでご確認ください。

Katsuura Onsen (勝浦温泉)04

Katsuura Onsen

勝浦温泉

Morning market town + cool summer beach onsen

日本三大朝市の町、夏でも涼しい外房の海岸温泉

SpringSodium chloride spring塩化物泉
Fromfrom ¥13,000 / night
SourceFree-flow (kakenagashi) per public info/ 源泉かけ流し(公式情報)

Katsuura wears two famous badges. The first is its morning market — the Katsuura Asaichi, founded in 1591 and counted among Japan's "Three Great Morning Markets" alongside Wajima and Hida-Takayama; for over 430 years it has set out fresh-landed fish, local vegetables and dried-fish snacks every morning except Wednesdays. The second is its climate: since records began in 1906 the town has never once logged a 35°C "extreme heat" day (its all-time high is 34.9°C, set back in 1924), so cool sea breezes make it a rare summer-friendly onsen escape. Add the rugged scenery of Cape Hachiman and the Katsuura Undersea Park, and it is about 100 minutes from Tokyo Station on the Wakashio express.

  • "Japan's Three Great Asaichi" — 430-year morning market
  • Rare cool-summer coast (almost no 35°C+ on record)
  • Photogenic Cape Hachiman (Hachiman-misaki)

Hours and prices vary — always confirm on the official site before visiting.
営業時間・料金は変動するため、必ず公式サイトでご確認ください。

Tateyama Onsen (館山温泉)05

Tateyama Onsen

館山温泉

Blue waters + sandstone cliffs at peninsula tip

青い海と地層の崖、内房南端の温泉地

SpringSodium chloride spring塩化物泉
Fromfrom ¥13,000 / night
SourceFree-flow (kakenagashi) per public info/ 源泉かけ流し(公式情報)

Tateyama sits at the southwest corner of the Boso Peninsula, the point where the open Pacific meets the mouth of Tokyo Bay, and its shore falls within the Minami-Boso Quasi-National Park. The coast is sculpted from soft sandstone, wave-cut into the photogenic layered cliffs the area is known for, with calm blue coves tucked in between. Landmark stops include the cliff-top Sunosaki Lighthouse, which looks across the water to the Miura Peninsula, and the dramatic Gake-Kannon (Daifukuji), a vermilion temple hall built into a sheer rock face. It is about two hours from Tokyo on the Sazanami limited express and the Uchibo Line, or a quick run across the Aqua-Line by car.

  • Scenic coast in Minami-Boso Quasi-National Park
  • Photogenic sandstone layered cliffs
  • Sunosaki Lighthouse + Gake-Kannon cliff temple

Hours and prices vary — always confirm on the official site before visiting.
営業時間・料金は変動するため、必ず公式サイトでご確認ください。

Insider Tips for Chiba

Know before you go

千葉の旅で知っておきたい5つのこと

Pacific Sunrise Bathing

太平洋の日の出風呂を狙う

Kamogawa and Katsuura ryokan are positioned for sunrise viewing — many east-facing baths open at 5–6am specifically for this. Set your alarm; the sun rising over the Pacific from the bath is one of Japan's most iconic onsen experiences.

鴨川・勝浦の宿は朝日が見やすい東向きが多く、5〜6時には朝風呂が開く宿も。太平洋から昇る朝日を露天風呂から眺める体験は、千葉温泉旅の白眉。

Katsuura Asaichi Morning Market

勝浦の朝市を歩く

430-year tradition. Open 6:30–11:00am most days (closed Wed/some holidays). Fresh-caught seafood, local vegetables, and dried-fish snacks — mostly under ¥1000. After your morning bath, this is the perfect way to start your day.

勝浦朝市は430年の伝統。水曜・一部祝日休、6:30〜11時。新鮮な海鮮・野菜・名物の煎餅などほぼ1000円以下。朝風呂のあとに散策が王道。

Time Yoro for Late Foliage

養老の紅葉は晩秋に

Yoro Gorge foliage peaks late November to early December — among the latest in the Kanto region thanks to the maritime climate. Pair with the nostalgic Kominato Railway through rural rice paddies.

養老渓谷の紅葉ピークは11月下旬〜12月初旬と、関東でも最も遅い部類。海岸気候の恩恵。レトロな小湊鐵道で田園地帯を抜けるルートが情緒満点。

Winter Flower Tour at Shirahama

冬の白浜花畑

Shirahama's flower fields bloom December through April — when most of Japan is in winter. Many ryokan offer "flower-picking experiences" as add-ons. Pair with Nojima-zaki Lighthouse sunset.

白浜の花畑は12〜4月、日本中が冬の時期に咲き乱れる希少エリア。多くの宿で花摘み体験を提供。野島崎灯台の夕日とセットで。

Aqua-Line Shortcut from Yokohama

横浜・川崎から行くならアクアライン

The Tokyo Bay Aqua-Line tunnel-bridge from Kawasaki to Kisarazu cuts Yokohama-to-Boso travel time dramatically — Kamogawa in 90 min, Katsuura 100 min by car. The "Umihotaru" PA midway is itself a tourist attraction.

川崎〜木更津を結ぶ東京湾アクアラインで、横浜から房総は劇的に近い(鴨川90分、勝浦100分)。海上のPA「海ほたる」自体が観光地。

Travel Essentials

Plan your trip

旅の準備

Book a Ryokan

Use major Japanese travel platforms to find ryokan with private open-air baths, tattoo-friendly facilities, or vegan kaiseki meals.

eSIM & WiFi

Most onsen towns have spotty 4G coverage. A Japan eSIM or pocket WiFi keeps Google Maps and translation apps running smoothly.

Getting There

See each onsen listing above for access details. Most Chiba onsen towns are reachable by JR trains, limited express, or highway bus; for remote springs, a rental car gives the most flexibility.

FAQ

Common questions

よくある質問

Is Chiba onsen really worth visiting from Tokyo?東京から千葉温泉に行く価値は?

Yes — Chiba offers a completely different vibe (seaside, slow, warm winters) within 90 min of Tokyo. It's ideal when Hakone is overcrowded, or you want a coast-and-onsen combo. Less famous than Hakone, but Pacific sunrise from the bath is unbeatable.

価値あり。東京から90分で完全に異なる雰囲気(海・スロー・温暖な冬)。箱根の混雑を避けたい時、海+温泉セットを求める時に最適。知名度は低いが太平洋日の出風呂は唯一無二。

Best time of year to visit Chiba onsen?千葉温泉のベストシーズン

December–April for Shirahama flower fields and mild coastal climate. May–June for sea green. Late November to December for Yoro foliage. Summer is hot in most areas but Katsuura stays cool (no 35°C+).

12〜4月:白浜の花畑、温暖な海岸気候。5〜6月:新緑の海。11月末〜12月:養老の紅葉。夏は暑いが勝浦は涼しい(35℃を観測したことがない)。

How long should I stay in Chiba?千葉温泉の滞在日数は?

Even a single overnight is rewarding — Tokyo Station → Katsuura in about 90 min (Kamogawa ~2 hours), soak, dinner, sunrise bath, return by afternoon. Add a second night for Yoro Gorge foliage or southern Boso (Tateyama/Shirahama) flower tour.

1泊でも十分。東京駅→勝浦は約90分(鴨川は約2時間)、夜温泉→朝の日の出風呂→午後帰京。2泊なら養老紅葉や南房総(館山/白浜)花畑観光を追加。

Explore More

More in Kanto region

関東地方の他の県も見る

← Back to Kanto (関東)