Hiroshima Hiroshima City
Tsuboniwa sauna and a semi-outdoor relaxation area facing the sky
"Hiki stargazing sauna" is a reservation-only sauna facility in Nekoyamacho, Naka Ward, Hiroshima City. It features a sauna room overlooking a tsuboniwa courtyard, where you can do self-löyly on a Harvia stove, as well as an ice-cold cold plunge bath. There is a semi-outdoor relaxation area with a skylit, open ceiling, and at night you can experience an exquisite state of perfect relaxation while gazing up at the starry sky.
Designed by Suppose Design Office, this exquisite sauna room overlooks a tsuboniwa courtyard. It features a luxurious dual setup with a bouna sauna that hides the heat source at the back, and a Harvia stove that allows self-löyly. While taking in the beautiful tsuboniwa scenery, you can enjoy an ultimate sweating experience with powerful yet gently enveloping heat and high-quality steam.
A deep and spacious cold-water bath chilled to the bone by a chiller. The cold water instantly tightens your body after the sauna raises your temperature to the limit. After cooling down, head to the semi-outdoor rooftop relaxation area, where you can look directly up at the blue sky or starry sky through the open ceiling. Feel the pleasant breeze and experience an exquisite state of perfect relaxation, far away from everyday life.
Irregular Holidays
Visited by the Editor-in-Chief
The Editor-in-Chief visited in person in February 2026
A refined and premium private sauna experience
Read the full review
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A long-established sauna with powerful auto-löyly and self-löyly scented with hojicha
Hiroshima
An approximately 100°C sauna with mist auto löyly and an all-male SPA with soothing jazz
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A Showa strong-style ultra-high-temperature sauna and panoramic outdoor relaxation with views of Fukuyama Castle
JAPAN'S FINEST ONSEN & SAUNA
The Finest Onsen & Sauna in Japan
57 SELECTIONS
Most of what we surveyed never even made it onto this site. This book is a further cut from what did. Our editor bathed in every onsen and sauna in it, and wrote only what they confirmed on the ground.
