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♨️150 years of hot spring rising right beneath your feet

Gunma · Hoshi Onsen Chojukan

1

Hoshi-no-yu — The Iconic Mixed Bath

• ♨️Built in 1895, with the spring welling up directly from the bathtub floor
• 🏛️The high ceilings and arched windows, in Meiji-era Rokumeikan style, remain just as they were
• ⏰Mixed bathing by default, with women-only hours from 8:00 to 10:00 p.m.

2

More Baths — Tamaki-no-yu and Choju-no-yu

• 🪵Tamaki-no-yu is an open-air hinoki cypress bath filled with the scent of wood
• 🏅Choju-no-yu earned a perfect score on all six criteria from the Japan Natural Hot Spring Examination Institute
• 🌡️A reducing spring that holds a natural temperature of around 40°C

3

Rooms — The Heritage Main Building and Riverside Annex

• 🏯The main building (1875) housed literary guests like Kawabata Yasunari and Yosano Akiko
• 🌊The annex (1940) offers ten 8-mat tatami rooms along the Hoshi River, fitted with Taisho-era glass windows
• 🖼️The main building, Hoshi-no-yu, and the annex were all registered as National Tangible Cultural Properties in 2006

4

Kunzanso and Horyuden — Rooms of Distinction

• ⚔️Kunzanso is a gallery-style room named for sword scholar Honma Kaoriyama
• 🌟Horyuden, a premium wing built in 1988, has even hosted Sweden's Crown Princess Victoria
• 🪟A quiet layout that lets the sound of the Hoshi River and the changing seasons drift in through the window

5

Cuisine — Gifts of the Mountains and River

• 🍖Meals built around local ingredients like Joshu beef and Joshu barley-fed pork
• 🐖Enjoy 12-month-aged local prosciutto and iwana char from the clear mountain streams
• 🍶Paired with local sake handpicked by the owner and Koshihikari rice cooked in pure spring water

6

History and Scenery — The Feel of a Hidden Spring

• 📜A 150-year history that began in 1875, when Okamura Mitsugu opened it as an inn
• 🏞️Set in a special zone of Joshin'etsu Kogen National Park, surrounded by the Hoshi River and old-growth forest
• 🍂A hidden hot spring where the seasons show clearly, from fresh spring greenery to winter snow

7

Facilities and Warmth — Comfort Deep in the Mountains

• 🔥Spend a quiet moment in the atmospheric space around the irori hearth
• 🚻Annex rooms come with modern toilets, blending tradition with comfort
• 🚗A hidden hot spring reached along mountain roads, in Nagai, Minakami, Gunma

At Hoshi Onsen Chojukan, the spring still rises straight up through the bathhouse floor, and the 150-year-old main building stands preserved as a cultural property. Deep in the mountains of the Joshin'etsu Highland, discover a true hidden hot spring of Japan.

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* This introduction was compiled from information published by each property (official website and similar sources), so some details may differ from what you find on the day. It is AI-assisted and can contain errors — please check the official website and the details shown at booking before you reserve.

From onsen etiquette to check-in — the things worth knowing first.

Check In/Check Out Policy · Check In: 15:00 · Check Out: 10:30 · Last Check In: 20:00

* These policies are the property's own text, in English; the cancellation policy shown at booking takes precedence.