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Yamanashi Hayakawa Town

Nishiyama Onsen Keiunkan

A Guinness-recognized inn where natural hot spring water flows through every guest room, and the world's oldest hot spring lodging

  • Scenic View
  • Nature Immersion
  • Onsen Ryokan
  • Reserved onsen available
  • Drinking spring water available
  • Open 24 Hours
  • Natural Hot Spring
  • Free-flow from source

About Nishiyama Onsen Keiunkan

"Nishiyama Onsen Keiunkan" is a hot spring inn in Hayakawa Town, Minamikoma District, Yamanashi Prefecture. With more than 1,300 years since it first opened, it is recognized by Guinness World Records as the world's oldest inn, and it rigorously serves pure free-flowing water from its own source throughout the property, from the bathwater and showers to every guest room. After completing renovations in spring 2026, it added a cold plunge bath to the panoramic open-air bath "Bokei no Yu," which now features enhanced sauna facilities. In addition, the riverside open-air bath "Hakuhō no Yu" now includes a cave bath and bedrock bath. Surrounded by deep mountains in a remote hidden valley, guests can indulge in exquisite hot spring bathing and savor refined Japanese-style relaxation.

Hot SpringONSEN

Free-flow from source

Public Bath Bokei no Yu

A panoramic open-air bath on the 4th floor. The luxurious cypress-fragrant tubs are filled to the brim with pure water from the inn's own source, with no added heating or water. The water has an exceptionally soft feel, and its alkaline spring quality leaves the skin smooth, earning it a reputation as a beauty bath. Listen closely to the murmuring of the Hayakawa River and feel the pleasant river breeze, while at night you can spend a blissful moment immersed in a fantastical setting beneath a sky full of stars, wrapped in a sense of unity with nature.

Free-flow from source

Public Bath Hakuhō no Yu

A riverside open-air bath on the 1st floor. Its atmospheric stone design makes generous use of high-quality Hakuhō stone sourced locally in the Hayakawa basin. The spring 2026 renovation added a cave bath that recreates the atmosphere of the inn's former therapeutic-lodging era. Famous spring water with absolutely no added water or heating flows continuously, allowing you to feel the blessings of an ancient hot spring and the dynamism of nature in your whole body while looking out over the Hayakawa Gorge прямо in front of you.

Free-flow from source

Public Bath Hinko no Yu and Ishikaze no Yu

A panoramic public bath on the top floor. It features Hinko no Yu, which uses ancient cypress that spent more than 2,000 years in the deep mountains for the tubs, and Ishikaze no Yu, built with a stately stone design. Beyond the windows, a panorama unfolds of the Hayakawa Gorge and the Kaino mountain range, where you can enjoy the changing seasons. The alkaline beauty bath gently envelops the skin, warming you from the core and keeping you warm long after you get out.

Free-flow from source

Private Open-Air Baths Kawane and Seneo

Stone-built private open-air baths that can be enjoyed in privacy. Each offers spacious room for about 15 people at the same time. Even though they are completely private spaces, they are filled with luxurious free-flowing spring water from an exceptional source, with no added heating or water. Without anyone disturbing you, you can monopolize this famous spring and its quiet atmosphere to your heart's content, with the murmuring of the Hayakawa River and the mountain streams as your background music.

Free-flow from source

Guest Room Open-Air Baths and Guest Room Baths

Every guest room at Keiunkan is equipped with either a guest room bath or a guest room open-air bath. Most notably, just like the public baths and open-air baths, every guest room bath is supplied with pure free-flowing water from the inn's own source, with no added heating or water, including the bathwater and showers. In a private space, this promises the ultimate hot spring experience, letting you have the Guinness-recognized historic famous spring all to yourself whenever you want.

SaunaSAUNA

01SAUNA

Panoramic Open-Air Sauna

Men'sWomen's

The sauna located in the panoramic open-air bath Bokei no Yu. A spring 2026 renovation enhanced the facilities, creating an even more comfortable space. While the indoor temperature is mild, it gently encourages perspiration as you gradually warm your body in the abundant free-flowing water from the property's own hot spring source. Surrounded by the sound of the river and the feel of the breeze, you can face yourself in quiet solitude and deeply refresh both body and mind.

Facility Information

Address
409-2702 Nishiyama Onsen, Hayakawa Town, Minamikoma District, Yamanashi Prefecture
Business Hours
Open 24 HoursOpen Year-Round
Closed Days
Open Year-Round
Gender Access
Gender Separated
Tattoo Policy (Communal Bath)
Unknown (Please Check)
Official Website
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