A scenic Japanese garden open-air bath overlooking the Asama mountain range and luxurious private sauna in detached guest rooms
Nagano Komoro City
"Nunobiki Onsen Komoro" is a hot spring inn perched on a hilltop at the ruins of a mountain castle in Komoro City, Nagano Prefecture. Overlooking the clear waters of the Chikuma River, it offers a panoramic view of the magnificent seasonal scenery of the Asama mountain range, including Mount Asama and Mount Eboshi. The mildly alkaline spring at pH 8.33, known as "Nunobiki No. 2 Spring," is a superb beautifying bath with a soft feel on the skin and excellent heat retention that helps you stay warm after bathing. In addition to the spacious large public bath and open-air bath, the detached guest rooms "Nunobiki-an" and "Kokage-an" are luxuriously equipped with a private sauna and a cold water bath under the open sky.
TypeNatural Hot Spring
A high-quality hot spring sourced from "Nunobiki No. 2 Spring." Its mildly alkaline water at pH 8.33 is known as a "beautifying bath" for helping remove old skin cells and leaving the skin soft and smooth. The indoor bath is divided into "hot" and "normal" temperatures, allowing you to enjoy a blissful hot spring soak to suit your preference. 100% source water (heated).
TypeNatural Hot Spring
A spacious open-air bath made with natural stone and filled with a sense of openness. While soaking in the tub, you can take in sweeping views of the grand mountain scenery of the Asama range, including Mount Asama and Mount Eboshi, as well as the beautiful cityscape of Komoro. The water, rich in sodium, chloride, and metasilicic acid, helps keep you warm long after you get out.
TypeNatural Hot Spring
An exquisite private open-air hot spring bath in the detached guest rooms, drawing from Komoro's famed Nunobiki Onsen. In this supreme space free from interruption, you can soak whenever you like while gazing at Mount Asama, enjoying the ultimate private relaxation.
Closed Days: None
620-3 Okubo, Komoro City, Nagano 384-0071
Gender Access
Gender Separated
The above applies to the communal (shared) baths. At facilities with private baths or private saunas, guests with tattoos may still be able to bathe. Please check with the facility for details.
Curated by an expert who visits onsen and sauna facilities every day and has explored 300+ locations — only facilities confirmed to be truly exceptional are featured.
Learn moreA scenic Japanese garden open-air bath overlooking the Asama mountain range and luxurious private sauna in detached guest rooms
Nagano Komoro City
"Nunobiki Onsen Komoro" is a hot spring inn perched on a hilltop at the ruins of a mountain castle in Komoro City, Nagano Prefecture. Overlooking the clear waters of the Chikuma River, it offers a panoramic view of the magnificent seasonal scenery of the Asama mountain range, including Mount Asama and Mount Eboshi. The mildly alkaline spring at pH 8.33, known as "Nunobiki No. 2 Spring," is a superb beautifying bath with a soft feel on the skin and excellent heat retention that helps you stay warm after bathing. In addition to the spacious large public bath and open-air bath, the detached guest rooms "Nunobiki-an" and "Kokage-an" are luxuriously equipped with a private sauna and a cold water bath under the open sky.
TypeNatural Hot Spring
A high-quality hot spring sourced from "Nunobiki No. 2 Spring." Its mildly alkaline water at pH 8.33 is known as a "beautifying bath" for helping remove old skin cells and leaving the skin soft and smooth. The indoor bath is divided into "hot" and "normal" temperatures, allowing you to enjoy a blissful hot spring soak to suit your preference. 100% source water (heated).
TypeNatural Hot Spring
A spacious open-air bath made with natural stone and filled with a sense of openness. While soaking in the tub, you can take in sweeping views of the grand mountain scenery of the Asama range, including Mount Asama and Mount Eboshi, as well as the beautiful cityscape of Komoro. The water, rich in sodium, chloride, and metasilicic acid, helps keep you warm long after you get out.
TypeNatural Hot Spring
An exquisite private open-air hot spring bath in the detached guest rooms, drawing from Komoro's famed Nunobiki Onsen. In this supreme space free from interruption, you can soak whenever you like while gazing at Mount Asama, enjoying the ultimate private relaxation.
Closed Days: None
620-3 Okubo, Komoro City, Nagano 384-0071
Gender Access
Gender Separated
The above applies to the communal (shared) baths. At facilities with private baths or private saunas, guests with tattoos may still be able to bathe. Please check with the facility for details.
Curated by an expert who visits onsen and sauna facilities every day and has explored 300+ locations — only facilities confirmed to be truly exceptional are featured.
Learn more