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Sira-ra-yu

白良湯はくりょうゆ

Public Bathhouse
Nanki-Shirahama Onsen
Kansai·Wakayama
0739-43-2614town.shirahama.wakayama.jp

Day Use

Yes
Mon09:00–10:30, 14:00–21:00
Tue09:00–10:30, 14:00–21:00
Wed09:00–10:30, 14:00–21:00
ThuClosed
Fri09:00–10:30, 14:00–21:00
Sat09:00–10:30, 14:00–21:00
Sun09:00–10:30, 14:00–21:00

Closed on Thursday, 07:00-09:00 available only for locals

¥420

Bathing & Water

Natural onsen water

Uses natural hot spring water

Indoor BathYes

Enclosed indoor bathing area

Policies & Services

TattooYes

Allows entry with visible tattoos

WashingYes

Shower, wash stations, soap and shampoo provided

You need to bring your own gel/shampoo, or buy it there.

TowelsYes

Towels available to rent or borrow

生臨湯

Seirin-yu

Operated by · 白浜温泉土地株式会社

塩
Chloride
Color
colorless and clear
Taste
with a strongly salty note
Odor
not recorded

Sodium Chloride spring

Hot source · 66°CStrong salt
Composition fingerprint19.3 g/kg dissolved · Hypertonic
Na⁺81
Cl⁻84
◀ CationsAnions ▶
Sodium Na⁺
salt's cation — pairs with chloride to make the water salty.
Chloride Cl⁻
table-salt anion — coats the skin and holds heat in.
Known good for
  • Warmingcold sensitivity
  • Aches & jointsstiff shoulders
  • Smooth skindry, rough skin

A sodium-chloride strong-salt spring, hypertonic and densely mineralized. It surfaces at 65.8 °C — among Japan\u0027s hottest natural sources — clear at the wellhead but unmistakably salty on the lips. Dissolved solids reach 19.3 g/kg, exceeding many seawater readings, and bathers come away with a noticeable mineral film clinging to the skin.

Sampled at wellhead·和歌山県温泉分析センター·Cert no. 1107号

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Sergey M
1 year ago· edited

625. Sira-ra-yu, Shirahama, Wakayama Onsen for ¥420. You need to bring your own body wash/shampoo or buy it there. The stated hours are 07:00 to 10:30 and 14:00 to 21:00 (except Thu), but the website lists local-only hours as 07:00 to 09:00. It is included in the Shirahama tegata (1 sticker for two people). By the changing room there is a small balcony with a view of the beach through the fence. The bath photo from the internet matches. Indoor bath, view from the window of the bay and the beach. The water is clear, slightly cloudy. There is a small amount of sparse brown mineral deposit. Temperature is 42. Breathing inside is fine. 17.06.2025

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Andrey Novikov
1 year ago

Sirara-yu: https://maps.app.goo.gl/kxXXf4K4ye3wRr6Z8 An old-timer local onsen in Shirahama (the one in Wakayama). Before noon it's only for residents; after noon it opens to everyone. One indoor bath, the water smells faintly of hydrogen sulfide. Listed as heated kakenagashi, 40-42°. There's a small balcony to cool off. 420 yen entry; towels and shampoo for an extra fee. The main plus is proximity to Shirahama city beach: from the bath and the balcony you can see the beach (lit up at night), and planes take off right over the onsen. The shower water is also onsen water, notably (I specifically asked). A solid third of the visitors are heavily tattooed. Not a rival to Shirahama's main onsen Saki-no-yu, but it's open until 9 PM and closer to the beach.

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Last updated June 23, 2026