Tennen-Onsen Choseinoyu Hot Spring

Day Use

Yes

Mon10:00–22:00

Tue10:00–22:00

WedClosed

Thu10:00–22:00

Fri10:00–22:00

Sat10:00–22:00

Sun10:00–22:00

except Wednesdays

¥800

Bathing & Water

Outdoor BathYes

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

OnsenYes

Uses natural hot spring water

Policies & Services

WashingYes

Shower, wash stations, soap and shampoo provided

ParkingYes

On-site or nearby parking available

Water treatment

from Article 18 disclosure

Added water
Yes
Reheated
No
Recirculated
No
Disinfected
Not disclosed
Bath additives
No

長生源泉

Chosei Spring

Operated by · 紀伊白浜温泉土地株式会社

Sampled at wellhead

曹

Bicarbonate

+ Chloride

Classification

Sodium Bicarbonate-Chloride spring

A hot 78.6 °C sodium bicarbonate-chloride spring among Japan's hotter natural sources, cooled before bathing. Weakly alkaline and soft on the skin, it carries a faint salty edge and notable body from 5,063 mg/kg of dissolved solids, with bicarbonate softness layered against the salt. A generous 110 mg/kg of metasilicic acid leaves the kind of silica film that makes skin feel noticeably smoother afterwards.

pH

7.60

Weakly alkaline

Source temperature

78.6°C

Hot

Tonicity

5.06g/kg

Hypotonic

Free CO₂

27mg/kg

Low