Relax in a scenic open-air bath overlooking Nagasaki Port and the world’s new top three night views, plus a breathtaking sauna
Nagasaki Nagasaki City
A scenic hotel located halfway up Inasayama in Nagasaki City, offering panoramic views of Nagasaki Port and the city. From the observatory open-air bath, Manten no Yu, on the top 11th floor, you can enjoy bathing while gazing out over the open sea by day and the world’s new top three night views sparkling like jewels by night. The observatory sauna also lets you admire Nagasaki’s beautiful scenery through the windows, making for a luxurious sweating experience with breathtaking views. Paired with a lavish buffet featuring local ingredients, it promises a special stay unique to Nagasaki.
TypeNatural Hot Spring
An onsen rich in metasilicic acid, which is said to help promote beautiful skin. It is colorless, transparent, and smooth in texture. At multiple large baths, including the observatory baths Ariake no Yu and Tachibana no Yu, you can enjoy a leisurely soak while taking in panoramic views of Nagasaki.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity6people
A dry sauna with excellent views, located next to the large public bath on the 11th floor. From the windows, you can take in the beautiful cityscape and harbor views of Nagasaki, and enjoy sweating it out in an open, spacious setting. Far-infrared heat gently warms your body, and a sauna session while admiring the breathtaking scenery delivers a truly exceptional sense of refreshment you won’t find anywhere else.
Water QualityTap Water
Capacity5people
A cold plunge bath installed right next to the sauna. Its moderate temperature makes it ideal for cooling down after a sauna session. It gently cools your heated body after taking in Nagasaki’s breathtaking views, guiding you into a pleasant state of relaxation.
Closed Days: None
〒852-8005 523 Otorimachi, Nagasaki City, Nagasaki Prefecture
Gender Access
Gender Separated
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 moreRelax in a scenic open-air bath overlooking Nagasaki Port and the world’s new top three night views, plus a breathtaking sauna
Nagasaki Nagasaki City
A scenic hotel located halfway up Inasayama in Nagasaki City, offering panoramic views of Nagasaki Port and the city. From the observatory open-air bath, Manten no Yu, on the top 11th floor, you can enjoy bathing while gazing out over the open sea by day and the world’s new top three night views sparkling like jewels by night. The observatory sauna also lets you admire Nagasaki’s beautiful scenery through the windows, making for a luxurious sweating experience with breathtaking views. Paired with a lavish buffet featuring local ingredients, it promises a special stay unique to Nagasaki.
TypeNatural Hot Spring
An onsen rich in metasilicic acid, which is said to help promote beautiful skin. It is colorless, transparent, and smooth in texture. At multiple large baths, including the observatory baths Ariake no Yu and Tachibana no Yu, you can enjoy a leisurely soak while taking in panoramic views of Nagasaki.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity6people
A dry sauna with excellent views, located next to the large public bath on the 11th floor. From the windows, you can take in the beautiful cityscape and harbor views of Nagasaki, and enjoy sweating it out in an open, spacious setting. Far-infrared heat gently warms your body, and a sauna session while admiring the breathtaking scenery delivers a truly exceptional sense of refreshment you won’t find anywhere else.
Water QualityTap Water
Capacity5people
A cold plunge bath installed right next to the sauna. Its moderate temperature makes it ideal for cooling down after a sauna session. It gently cools your heated body after taking in Nagasaki’s breathtaking views, guiding you into a pleasant state of relaxation.
Closed Days: None
〒852-8005 523 Otorimachi, Nagasaki City, Nagasaki Prefecture
Gender Access
Gender Separated
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