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Osaka-ya Hiina no Yu

加太淡島温泉 大阪屋 ひいなの湯かだあわしまおんせん おおさかや ひいなのゆ

Lodging
Kansai·Wakayama

Day Use

Yes
11:00–14:30, 15:00–19:00

11:00-14:30 (Mon-Sun) and 15:00-19:00 (Mon-Fri)

¥1,200

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

private reservation

Cold BathYes

Cold water plunge bath, typically used after sauna

private reservation

Capabilities

Private BathYes

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

Room OnsenYes

Private onsen bath in guest rooms, for overnight guests only

Policies & Services

TattooNo

Allows entry with visible tattoos

WashingYes

Shower, wash stations, soap and shampoo provided

加太淡島温泉

Kada Awashima Onsen
Bicarbonate
+ Chloride
Color
colorless and transparent
Taste
tasteless
Odor
odorless

Sodium Bicarbonate-Chloride spring

Composition fingerprint1.3 g/kg dissolved · Hypotonic
Na⁺96
HCO₃⁻49
Cl⁻46
CationsAnions
Sodium Na⁺
salt's cation — pairs with chloride to make the water salty.
Bicarbonate HCO₃⁻
"soda" — softens skin, leaves it smooth.
Known good for
  • Smooth skindry, rough skin
  • Warmingcold sensitivity
  • Cutsminor wounds

A sodium-led bicarbonate spring with a salty finish from a chloride sub-type — the classic jūsō-sen style softened by mild salinity. Weakly alkaline (pH 8.4) and gentle on the skin, it sits in Japan's beauty-water family. A cold-mineral source at 25.5 °C heated for bathing, with 1,342 mg/kg of dissolved solids giving the water moderate body.

Analyzed Aug 28, 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

Explore the water

Views

Sea

Highlights

Boat Bath

Programs

About

A ryokan in the fishing town of Kada that has been going for more than two hundred years, and it says plainly that it is neither a luxury house nor a designer one: the feeling it aims for is going back to the countryside. The baths face west across the Kitan Strait toward Tomogashima, which is the whole point, since the sunset put it on the hundred-sunset-inns list. Outside there are two tubs, one shaped like a boat and one built of rock; inside a large bath; a private bath you can book; and on the roof a barrel sauna with a cold bath and a lukewarm open-air onsen looking down on the fishing harbour. The water is a sodium bicarbonate chloride spring and leaves the skin soft. The name plays on hiina (ひいな), an old word for the paper dolls of Awashima Shrine (淡嶋神社) a short walk away, which sets them afloat on the sea in the hina-nagashi (雛流し) rite.

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Sergey M
8 months ago

632. Osaka-ya Hiina no Yu, Kada, Wakayama Visited for day use at 1200 yen (includes a small towel). Day use is available from 11:00 to 14:30 (Mon-Sun) and from 15:00 to 19:00 (Mon-Fri). They stamp the 88 Onsen of Wakayama stamp book. They sell the 12 Onsen of Wakayama stamp book. 1. Outdoor bath on a balcony. Essentially no view because of the fence. Judging by old photos, the outdoor baths used to have a more open view, but then they fenced them up. Clear water, temperature 40. 2. Indoor bath. During my first visit there was a partial view through reinforced glass, and during my second visit they covered the glass with completely frosted film right in front of me. Clear water, temperature 41. Breathing inside is fine. A sad example of fencing up and systematically eliminating any good view from the bath. 02.11.2025 12.11.2025

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A ryokan on the coast in Wakayama. The onsen has one indoor bath and a rotenburo. The water looks normal, with no distinctive features (didn't spot a characteristics sign). And there are no frills overall: a few washing stations and baths. No cold bath or sauna either. The baths rotate between men/women: the indoor baths are identical, but the rotenburo differ — one side has a single larger square bath, and the other has two smaller ones — one shaped like a small boat (noticeably hotter, fits about four people) and a barrel (cooler, for one or two). There's a great ocean view, but the rotenburo has a fence — you need to stand up. However, in the indoor bath you can raise the blinds and watch the sea from the tub. There's a kashikiri (private) bath and rooms with baths. Tattoos not allowed. The hotel itself is old but appears recently renovated — the wooden boards in the bathroom are fresh, half the equipment too (a new air conditioner contrasts with an old rumbling fridge and yellowed bathroom fixtures). The washitsu (Japanese-style) room looks stereotypically Japanese, beautiful. There was a massage chair right in the room (old one). A couple of fancy nice massage chairs are near the onsen entrance. They serve kaiseki (but our plan only had fish — meat had to be ordered separately) and don't overfeed — we managed to finish everything except the rice and even eat the leftovers from the kids (preschoolers get a separate set with things like karaage, while school-age kids get a reduced-portion adult set with sometimes odd items). There's a bus from the nearest train station and about five parking spots. There's also some newly opened spa zone (but it has separate hours for men/women). Highaeri is available, but I didn't check the details. Yukata for higaeri costs extra, and higaeri guests don't get access to the lounge with drinks. Conclusion: a good place if you want a Japanese ryokan with a view and food, and don't have particular requirements for the onsen.

Last updated July 29, 2026