Shiraraso Grand Hotel

白良荘グランドホテルはくりょうそうグランドホテル

Lodging
Kansai·Wakayama

Day Use

Yes

Bathing & Water

OnsenYes

Uses natural hot spring water

生湯

Shoyu Spring

Operated by · 白良荘

Chloride
Classification

Sodium Chloride spring

A sodium chloride hot spring on the Shirahama coast (source 56.6 C, neutral, hypertonic). Mineralization is solid at 18.18 g/kg — salty, heat-retaining water that leaves a fine mineral film on the skin. A generous 106.8 mg/kg of metasilicic acid puts it in the Japanese 'beauty-water' family, with skin feeling noticeably smoother after a soak.

Source temperature
56.6°C
Hot
Tonicity
18.18g/kg
Hypertonic
Free CO₂
132mg/kg
Low
Highlights
  • High silica

Analyzed Nov 18, 2013·和歌山県環境衛生研究センター·Cert no. 1035

Programs

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SM
Sergey M
4 months ago

665. Shiraraso Grand Hotel, Shirahama, Wakayama Visited in the evening for higaeri on the tegate pass. Higaeri hours are 15:00-21:00 (except Sat, days before holidays, Jul 1-Aug 31, Apr 27-May 6, Dec 28-Jan 4). Included in the Shirahama tegate (2 stickers). They sell the Wakayama 12 Onsen stamp book. Photos of baths from the internet match. There is a gender rotation for baths. I was in the Shiokaze area. Outdoor bath. Standing up, there's a great view of the ocean and the shore, but sitting down the view is lost - blocked by a fence with horizontal slats. Clear water, temperature around 41. Indoor bath with clear water, temperature around 42. Breathing inside is fine. 07.11.2025