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Tennen Onsen Hachi Hyaku Bō

天然温泉 八百坊てんねんおんせん はちひゃくぼう

Other
Tohoku·Yamagata

Day Use

Yes
06:30–22:30

Closed on the third Wednesday of each month.

¥700

Adults ¥700; children (ages 3–elementary) ¥400. Discounts: ¥550 on the 8th and 26th of each month. JAF discount available.

Bathing & Water

Natural onsen water

Uses natural hot spring water

Indoor BathYes

Enclosed indoor bathing area

SaunaNo

Dry heat sauna room

Cold BathYes

Cold water plunge bath, typically used after sauna

Capabilities

Mixed BathingNo

Shared bathing area for all genders

Policies & Services

WashingYes

Shower, wash stations, soap and shampoo provided

TowelsYes

Towels available to rent or borrow

ParkingYes

On-site or nearby parking available

Highlights

Cave Bath

About

A day-use public bath in Yamagata city with a single indoor hot spring pool and a cold-water bath. Rock sculptures and low lighting give the bath room a cave-like feel. The water runs clear with a faint brownish tint and leaves the skin noticeably smooth.

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Onsen Oni

Last updated June 25, 2026