Tennen Onsen Kasei-no-Yu

4.0★ · 37 Google ratings · Oita, Oita · 天然温泉キャセイの湯

✓ Natural hot-spring water✓ Free-flowing source water

Before you go

Can you bathe here?

Day visitors

✓ YesDay-use bathing is offered for 400 yen at the hotel front desk, from 2022 through 2026.stated by 3 visitors · Aug 2022 – Mar 2024

Hours

10:00–00:00from the facility listing

Tattoos

✓ AllowedVisitors in 2026 and 2026 reported that customers with tattoos or irezumi enter without being turned away.stated by 2 visitors · Jan 2026 – Jul 2026

Price

¥400The adult day-use fee has been consistently 400 yen from 2022 to 2026, paid at the hotel front desk.stated by 3 visitors · Mar 2024 – Aug 2026

Private bath

✓ YesA separate family/private bath can be reserved for about 2000 yen per hour, in addition to the main communal bath.stated by 3 visitors · Apr 2024 – Oct 2024

Bathing arrangement

Men and women separateThe facility has separate men's and women's bathing areas.stated by 2 visitors · Apr 2024 – Jul 2026

How we know this

Watch out

Lockers

Changing room lockers need no coin, though several visitors between 2024 and 2026 noted the lockers have no working locks or are absent, so valuables should be kept elsewhere.

stated by 3 visitors · Apr 2024 – Aug 2026

Hair dryer

A hair dryer is available, free on the women's side in 2024 but rentable at the desk on the men's side in 2025.

stated by 2 visitors · Apr 2024 – Jul 2025

Source temperature

The posted source temperature was about 51°C in 2023 and 51.6°C in 2024.

stated by 2 visitors · Mar 2023 – Apr 2024

Tattoos

Visitors in 2026 and 2026 reported that customers with tattoos or irezumi enter without being turned away.

stated by 2 visitors · Jan 2026 – Jul 2026

The bath

What you’ll find

This is a small hot-spring bath attached to a business hotel in Oita city, open to day-use visitors for 400 yen, known for its very hot, strongly salty source-fed water and a cold plunge bath.

Indoor baths

1The communal bathing area has one main indoor hot bath plus a separate cold bath.stated by 2 visitors · Apr 2024 – Aug 2024

Cold bath

✓ YesA cold plunge bath is available alongside the main hot bath, used by visitors from 2024 to 2026 for alternating bathing.stated by 3 visitors · Aug 2024 – Aug 2026

Lodging

✓ YesThe bath is attached to a business hotel, with hotel guests bathing free and outside visitors paying the day-use fee.stated by 4 visitors · Aug 2022 – Aug 2026

The water

Free-flowing (kakenagashi)

✓ YesMultiple visitors from 2023 to 2026 describe the bath as genuine source-fed (kakenagashi) hot spring water.stated by 2 visitors · Apr 2023 – Jun 2025

Spring type

Sodium-magnesium chloride-bicarbonate spring (strong salt spring)The spring is consistently identified as a strong sodium-magnesium chloride-bicarbonate (salt) spring from 2023 to 2026.stated by 3 visitors · Apr 2023 – Jul 2026

Source temperature

51.6°CThe posted source temperature was about 51°C in 2023 and 51.6°C in 2024.stated by 2 visitors · Mar 2023 – Apr 2024

Practical

What to bring

Soap & shampoo

✓ ProvidedShampoo and body soap are provided at the washing area, reported from 2024 through 2026.stated by 3 visitors · Aug 2024 – Aug 2026

Lockers

✓ FreeChanging room lockers need no coin, though several visitors between 2024 and 2026 noted the lockers have no working locks or are absent, so valuables should be kept elsewhere.stated by 3 visitors · Apr 2024 – Aug 2026

Hair dryer

✓ YesA hair dryer is available, free on the women's side in 2024 but rentable at the desk on the men's side in 2025.stated by 2 visitors · Apr 2024 – Jul 2025

Timing