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Mercure Wakayama Kushimoto Resort & Spa

Mercure Wakayama Kushimoto Resort & SpaMercure Wakayama Kushimoto Resort & Spa

Lodging
Kansai·Wakayama

Day Use

No

Bathing & Water

Natural onsen water

Uses natural hot spring 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

Policies & Services

WashingYes

Shower, wash stations, soap and shampoo provided

Water treatment

Treated and recirculated
from Article 18 disclosure
  • Added water
    Yes
  • Reheated
    Yes
  • Recirculated
    Yes
  • Disinfected
    Yes
    塩素系薬剤
  • Bath additives
    No

串本町温泉

Kushimoto-cho Onsen
Chloride

Calcium-Sodium Chloride spring

Composition fingerprint9.1 g/kg dissolved · Isotonic
Ca²⁺63
Na⁺36
Cl⁻100
CationsAnions
Calcium Ca²⁺
settling and calming; can leave a white mineral bloom.
Chloride Cl⁻
table-salt anion — coats the skin and holds heat in.
Known good for
  • Warmingcold sensitivity
  • Cutsminor wounds
  • Recoveryfatigue, stress

A calcium- and sodium-led sodium chloride spring — salty and heat-retaining, leaving a faint mineral film on the skin. Richly mineralized at 9,132 mg/kg of dissolved solids, it is isotonic and neutral in pH, so it sits gently against the body. The bath water is diluted, reheated, recirculated, and chlorine-disinfected before reaching the pool, and the certificate marks it as bathing-only, not for drinking.

Analyzed Feb 24, 2023·一般社団法人 和歌山県薬剤師会·Cert no. 和歌山県第2号

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4.0

1 review

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Sergey M
9 months ago

642. Mercure Wakayama Kushimoto Resort & Spa ★★ Stayed overnight, didn't get meals. Prices can be under 10k yen for two (without meals), and the hotel's condition is decent (you can tell it's aging, but they update it periodically), there are various perks/options (lounge with drinks, bike rental, pool, etc.), and very solid baths. Bath photos from the internet roughly match — the rotenburo looks and feels cooler in person, while the indoor bath is a bit simpler in person. 1. Outdoor stone bath. There's a view of the bay: sitting in the center of the bath you can see a small portion of the water, but at the edge or standing up the panorama expands significantly. The stones in the bath architecture are well-placed — you can take a break sitting on them. In the evening the stars were very visible. Clear water, temperature 41-42 in different parts of the bath. 2. Indoor zone. Breathing inside is good. 2.1. Large bath with clear water, temperature 40. 2.2. Sauna. 2.3. Cold bath. Great rotenburo and the place looks more expensive than its price. Considering the cost performance, recommended for an overnight stay in Kushimoto. 03.11.2025 04.11.2025

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Last updated June 29, 2026