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Cosmos Hot Spring

コスモス温泉こすもすおんせん

Public Bathhouse
Kyushu & Okinawa·Miyazaki

Day Use

Yes
Mon10:00–21:00
Tue10:00–21:00
Wed10:00–21:00
ThuClosed
Fri10:00–21:00
Sat10:00–21:00
Sun10:00–21:00
¥500

Adults ¥500, elementary/middle school ¥300, preschool ¥200, under 3 free

Bathing & Water

Natural onsen water

Uses natural hot spring water

Outdoor BathNo

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

SaunaNo

Sauna room of any kind

Cold BathYes

Cold water plunge bath, typically used after sauna

Bathing Arrangements

Mixed BathingNo

Shared bathing area for all genders

Policies & Services

WashingYes

Shower, wash stations, soap and shampoo provided

ParkingYes

On-site or nearby parking available

Views

Mountains

Programs

About

A simple neighborhood bath in Kobayashi with two hot indoor tubs and a cold bath, all fed by free-flowing (kakenagashi, 源泉かけ流し) spring water. The bath hall has a retro feel, and a large window looks out toward the mountain Hinomoridai (夷守岳). Regulars say the water is notably smooth on the skin. A quiet local spot that regulars have made their own.

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Onsen Oni

Last updated June 25, 2026