Yamaguchi Shimonoseki City
A space to enjoy the ultimate relaxation with a cold plunge bath fed by hot spring source water and a silky natural hot spring
"Nishinoichi Onsen Hotarunoyu" is a day-use hot spring facility in Toyotacho, Shimonoseki, Yamaguchi Prefecture. It is attached to the roadside station Hotarukaido Nishinoichi, so you can enjoy an authentic bathing experience between shopping and meals. Its greatest appeal is the viscous alkaline natural hot spring, which helps dissolve dead skin cells and leaves your skin smooth. After taking your time in the clean, dry sauna made with natural wood, you can cool down in the cold plunge bath luxuriously filled with the hot spring source water and tighten your skin. Around the outdoor bath, many chairs are set out so you can enjoy a blissful open-air bath while feeling the pleasant mountain breeze. Two bath areas, Mai no Yu and Hikari no Yu, are offered on a monthly alternating basis for men and women, allowing you to enjoy a different atmosphere each time you visit.

A natural hot spring with a silky texture, using alkaline simple hot spring water with a pH of 9.3. Its mildly alkaline spring quality gently dissolves dead skin cells, giving you the feeling of soaking in lotion. It features a spacious indoor bath and an open-air bath where the mountain breeze flows through, bringing deep relaxation to both body and mind.

A clean, inviting dry sauna made with natural wood. The settings are designed so it never gets too hot, letting you work up a pleasant sweat at a comfortable pace and warm up gently from the core. The subtle scent of wood is soothing, and you can enjoy a deep sense of relaxation in the quiet, calm space.

A cold plunge bath located right next to the sauna, generously filled with hot spring source water. The source water pleasantly seeps into the pores opened by the sauna, gently yet sharply cooling down your overheated body. Thanks to the hot spring minerals, another nice touch is that your skin feels smooth after bathing.
The fourth Tuesday of every month (*some months vary)
Guests with tattoos are not permitted.