Kamenoi Hotel Nachikatsuura

亀の井ホテル那智勝浦かめのいホテルなちかつうら

Lodging

Katsura Onsen

Kansai·Wakayama

0735-52-0333 kamenoi-hotels.com

Day Use

Bathing & Water

Natural onsen water

Uses natural hot spring water

Outdoor BathYes

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

SaunaNo

Dry heat sauna room

Capabilities

Private BathNo

Private bath available for day-use visitors or hotel guests to reserve

Room OnsenYes

Private onsen bath in guest rooms, for overnight guests only

Mixed BathingNo

Shared bathing area for all genders

Policies & Services

TattooNo

Allows entry with visible tattoos

DiningYes

Restaurant or dining open to visitors (not just hotel meal plans)

WashingYes

Shower, wash stations, soap and shampoo provided

TowelsYes

Towels available to rent or borrow

Rest AreaYes

Relaxation space for after bathing

ParkingYes

On-site or nearby parking available

はまゆう・滝の湯混合泉

Hamayu / Taki-no-Yu Mixed Source

Operated by · 株式会社マイステイズ・ホテル・マネジメント

Mixed source

湯

Simple

Color: colorless and clear
Taste: faint sulfur taste
Odor: faint hydrogen-sulfide note

Sodium Chloride spring

pH 8.6Alkaline

Composition fingerprint0.3 g/kg dissolved · Hypotonic

Na⁺81

Ca²⁺19

Cl⁻81

◀ 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

Smooth skindry, rough skin
Recoveryfatigue, stress

A blended spring drawing from two wells — Hamayu and Taki-no-Yu — mixed in the hotel's basement pit before reaching the baths. Classified as an alkaline simple thermal spring (pH 8.6 at the wellhead), it sits squarely in the Japanese 'beauty-water' family — soft, slippery, and gentle on the skin. A faint hydrogen sulfide note and a whisper of sulfur on the tongue come through behind a chloride-led, lightly mineralized base. A hypotonic low-temperature source (33 °C) that is reheated for bathing.

Sampled at mixing tank·Analyzed Oct 23, 2023·一般社団法人和歌山県薬剤師会医薬品・公衆衛生検査センター·Cert no. 第E2310098号

Explore the water

Views

Sea

Mountains

About

The baths here run on the hotel's own spring, which flows at a steady rate and feeds the communal indoor bath, the garden rotenburo (open-air bath), and most of the private in-room baths. The garden rotenburo is a Japanese-style open space with the sea laid out in front of it and, further back, the Kumano mountains and Nachi Falls on the horizon. At night the fishing lights on the water add to the mood. The water is softly alkaline and leaves the skin smooth. Day-use bathing is not available.

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Rakuten TravelStay JalanStay

3.0

2 reviews

from 1 reviewer

Sergey M

9 months ago

652. Kamenoi Hotel Nachi Katsuura Kumano Kodo, Nachikatsuura, Wakayama ★ Stayed overnight. No day use. Originally on the Wakayama 12 onsen list, but even after being removed, the staff found the Wakayama 12 stamp and sold it (they had a huge stack of stamps in a cabinet). Bath photos from the internet match. For food, I got a double kaiseki for one — it was standard. Tatami room with a bay view. There's a utility balcony, but the bay view from it is great. Onsen water is stated for the in-room bath. 1. Outdoor zone. The view is supposed to be of the bay, but you actually can't see it from the bath. However, the internal landscaping is very pleasant and effectively creates the scenery — trees, plants, lanterns. Cozy both in the evening and daytime, with a pleasant breeze from the bay. 1.1. Main stone bath. Clear water, temperature 41. 1.2. Small bath. Clear water, temperature 32. 2. Large spacious indoor zone. Bath with clear water, temperature 40. Breathing inside is good, even cool. Overall a solid place, but doesn't particularly grab you. Worth keeping in mind if the price is right on a certain date. 04.11.2025 05.11.2025