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SHIRAHAMA KEY TERRACE HOTEL SEAMORE

SHIRAHAMA KEY TERRACE HOTEL SEAMORESHIRAHAMA KEY TERRACE HOTEL SEAMORE

Lodging
Nanki-Shirahama Onsen
Kansai·Wakayama
0739-43-1000keyterrace.co.jp

Day Use

Yes
13:00–20:00
¥1,000

Bathing & Water

Outdoor BathYes

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

SaunaYes

Dry heat sauna room

Cold BathYes

Cold water plunge bath, typically used after sauna

OnsenYes

Uses natural hot spring water

Policies & Services

WashingYes

Shower, wash stations, soap and shampoo provided

TowelsYes

Towels available to rent or borrow

かごの湯温泉

Kago no Yu Onsen

Operated by · 株式会社 白浜館

Sampled at wellhead
塩
Chloride
+ Bicarbonate
Classification

Sodium Chloride-Bicarbonate spring

A sodium-led chloride / bicarbonate hot spring (60.5 °C wellhead, hypotonic, weakly alkaline). The water is colorless and clear with only a faint salty edge — gentle and warming rather than aggressive on the skin. A generous 117.6 mg/kg of metasilicic acid leaves the kind of silica film that puts this water in the Japanese 'beauty-water' (bihada-no-yu) family, with bicarbonate adding a soft, slick finish on top of the chloride heat-retention.

pH
7.10
Weakly alkaline
Source temperature
60.5°C
Hot
Tonicity
4.94g/kg
Hypotonic
Flow rate
194L/min
Typical
Free CO₂
71mg/kg
Low
Color
Colorless and clear
Taste
Faintly salty
Odor
Odorless
Highlights
  • High silica

Analyzed Feb 16, 2017·一般社団法人 和歌山県薬剤師会·Cert no. 第E1702192号

Views

Sea

Highlights

Ganbanyoku
Foot Bath

Programs

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4.0

2 reviews

from 1 reviewer

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SM
Sergey M
1 year ago

627. Shirahama Key Terrace Hotel Seamore, Wakayama (pt.2) ★★ 3. Lower level (outdoor area). 3.1. Stairs down from the indoor area to the outdoor area. In summer it was poorly maintained - lots of cobwebs at the top, and a fair number of spiders and other local insects on the walls. 3.2. Gorgeous view of the bay and observation tower from the outdoor area. Outdoor infinity onsen with two levels - standing and lying down, but the infinity section is narrow. Clear water with small white mineral fragments. A few small insects and a dead crab in the water. 41 degrees. Cool place, highly recommended for a visit. If the outdoor area were better maintained and the infinity section wider, I'd rate it even higher. 17.06.2025

SM
Sergey M
1 year ago

627. Shirahama Key Terrace Hotel Seamore, Wakayama (pt.1) ★★ Higaeri for 1000. At the main reception there was a Russian-speaking staff member - they sent me downstairs for the onsen payment. Higaeri stated as 13:00 to 20:00. Part of the Shirahama tegata (2 stickers). They sell the 12 Onsen of Wakayama stamp. They issue Toreco cards for the onsen. 1. Upper level (indoor area). Bath with clear water, 41 degrees. Stuffy inside. 2. Middle level (indoor area). View of the bay through glass. Breathable inside. 2.1. Large bath with clear water, 41 degrees. 2.2. Small bath with clear water, 41 degrees. 2.3. Three barrels with clear water, 39 degrees. 2.4. Round hot shallow bath. 2.5. Seated spots with constantly flowing water. 2.6. Sauna. 2.7. Stone bath. 2.8. Cold bath. 17.06.2025