Shizuoka Ito City
An exceptional sukiya-style detached inn where every room features an open-air bath with deep ocean water
Akazawa Geihinkan is a luxury detached inn in Ito, Shizuoka Prefecture, with 15 rooms in total. Its expansive grounds overlooking Sagami Bay are dotted with rooms built in the refined sukiya style, and every room comes with a private open-air bath using deep ocean water. The top-tier detached special suites are also equipped with private saunas, allowing guests to enjoy blissful relaxation without a care in the world. The large communal bath in the building also lets guests unwind slowly in mineral-rich deep ocean water, and the adjacent day-use hot spring facility and spa can be used free of charge. Surrounded by tranquility and traditional beauty, it offers the ultimate private stay.

A large communal bath using pure deep ocean water drawn from 800 meters below sea level in the sea off Izu. The soft water, rich in minerals, gently envelops the skin and warms you deeply from within. Through the large windows, the greenery of the beautiful garden spreads out, allowing you to relax both body and mind in a tranquil setting harmonized with nature.

A private open-air bath equipped in every guest room and lavishly filled with deep ocean water. In a completely private space where no one can disturb you, you can enjoy a bath while feeling the pleasant outdoor air and abundant greenery. With the breeze and the rustling of the trees as your background music, you can savor a special time spent with scenery that changes between day and night.
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JAPAN'S FINEST ONSEN & SAUNA
The Finest Onsen & Sauna in Japan
61 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.