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Tochigi Nasu Town

Omaru Onsen Ryokan

A hot spring river gushes straight into a vast open-air bath! A one-room inn with hidden hot spring waters and skin-beautifying benefits, standing at the deepest point of Oku-Nasu

  • Nasu Onsen Village
  • Nature Immersion
  • Onsen Ryokan
  • Reserved onsen available
  • Drinking spring water available
  • Natural Hot Spring
  • Free-flow from source

About Omaru Onsen Ryokan

"Oku-Nasu Onsen Omaru Onsen Ryokan" is an inn in Nasu Town, Nasu District, Tochigi Prefecture, with more than 200 years of history and a member of the Japan Association of Hidden Hot Spring Inns. Located at the farthest point of the Nasu Onsen area at an elevation of 1,300 m, it is famous for its large open-air bath, Kawa no Yu, which was created by damming up the hot spring river flowing from the back mountain. Its private spring, rich in metasilicic acid, is known for its skin-beautifying benefits and is also piped to the Nasu Imperial Villa. Other attractions include potable spring water, modern Japanese-style rooms, and refined kaiseki cuisine.

Hot SpringONSEN

Free-flow from source

Mixed-Gender Large Open-Air Bath Kawa no Yu

The signature bath of Omaru Onsen Ryokan, this wild and scenic mixed-gender large open-air bath was created by damming up the hot spring river that flows through the grounds. It consists of three levels: Shirakaba no Yu, Ajisai no Yu, and Azami no Yu, and is fed directly by abundant water gushing from the river's source in a true free-flowing direct-from-the-source style. With bathing wear required, men and women can enjoy an exceptional hidden hot spring experience together while feeling the breath of nature all around them.

Free-flow from source

Women-Only Open-Air Baths Shakunage no Yu and Yama-yuri no Yu

These women-only open-air baths are surrounded by abundant nature and designed so female guests can relax with complete peace of mind. There are two baths, the spacious Shakunage no Yu and Yama-yuri no Yu, which is located closer to the upper reaches of the river, and both feature luxurious free-flowing direct-from-the-source hot spring water. Guests can fully enjoy the skin-beautifying bath, rich in metasilicic acid, together with Nasu's beautiful seasonal scenery, without worrying about those around them.

Free-flow from source

Large Public Bath Sasa no Yu and Sakura no Yu

These gender-separated indoor large public baths have a calm Japanese atmosphere with interiors made of cypress and stone. There is Sasa no Yu for men and Sakura no Yu for women, and each features multiple baths with different temperatures. Fresh spring water flows in 24 hours a day, the water feels exceptionally soft on the skin, and it warms the body deeply from within. A potable spring water area is also available, allowing guests to directly take in the fresh, tasteless, odorless hot spring water, which is said to be effective for gastrointestinal ailments.

Free-flow from source

Private Bath Oku no Yu

A free-flowing direct-from-the-source private bath available exclusively to overnight guests for a truly private experience. In the quiet, relaxed space, you can have the skin-beautifying water rich in metasilicic acid all to yourself. Away from the bustle of day-trippers, it offers the ultimate private bathing experience, allowing families and couples to warm their bodies slowly and surrender to the serenity of a hidden hot spring at the farthest reaches of Nasu and its exceptional water quality.

Facility Information

Address
269 Yumoto, Nasu Town, Nasu District, Tochigi 325-0301
Business Hours
11:30〜10:00

[Day-use bathing] 11:30–15:00 (last admission 14:30, irregular holidays)

Closed Days
Irregular Holidays
Gender Access
Mixed Gender
Tattoo Policy (Communal Bath)
No Tattoos
Official Website
View official site

Access

View official site

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A curator who has visited over 300 facilities nationwide handpicks 52 exceptional ones they wholeheartedly recommend. The only guidebook that deeply explores the allure of onsen and sauna—plus culture and etiquette.

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JAPAN ONSEN COLLECTION
JAPAN ONSEN COLLECTIONJapan's Finest Onsen & Sauna
A journey through 52 renowned hot springs and saunasJAPAN ONSEN & SAUNA GUIDE

Japan's Finest Onsen & Sauna

52 Extraordinary Destinations

A curator who has visited over 300 facilities nationwide handpicks 52 exceptional ones they wholeheartedly recommend. The only guidebook that deeply explores the allure of onsen and sauna—plus culture and etiquette.

300+Facilities
Visited
Read a free previewJAPAN ONSEN & SAUNA GUIDE