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Hinata no Yu

天然温泉 ひなたの湯てんねんおんせん ひなたのゆ

Open-air city baths on the ninth floor in Shin-Osaka

Public Bathhouse
Kansai·Osaka

Day Use

Yes
Mon06:00–01:00
Tue06:00–01:00
Wed06:00–01:00
Thu06:00–01:00
Fri06:00–01:00
Sat08:00–01:00
Sun06:00–01:00

Last entry is one hour before closing, so by midnight even though the baths stay open until 1am.

¥880

Adult entry is 880 yen on weekdays and 1000 yen on weekends and public holidays. A child ticket (roughly age 4 through elementary school) is about 400 yen, and children under 3 enter free.

Bathing & Water

Natural onsen water

Uses natural hot spring water

Outdoor BathYes

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

SaunaYes

Sauna room of any kind

Cold BathYes

Cold water plunge bath, typically used after sauna

Bathing Arrangements

Mixed BathingNo

Shared bathing area for all genders

No mixed bathing is mentioned anywhere across the official site, the editorial summary, or five detailed reviews; treated as ordinary gender-separated bathing by default.

Policies & Services

TattooWith Conditions

Allows entry with visible tattoos

Entry is allowed if a tattoo-cover sticker, sold at the front desk, fully hides the tattoo; if it comes loose in the bath the guest must leave the tub straight away.

DiningYes

A restaurant or dining room open to visitors, not only meals for overnight guests

WashingYes

Shower, wash stations, soap and shampoo provided

TowelsYes

Towels to rent or borrow at the desk

A discount coupon can make the towel set free, which implies it is normally a paid rental item rather than a giveaway.

Rest AreaYes

Relaxation space for after bathing

源泉なごみの湯

Nagomi no Yu Spring

Operated by · 信和ホテルズ株式会社

湯
Simple
Color
faintly yellow and clear
Taste
tasteless
Odor
odorless

Sodium Bicarbonate spring

High silica
Composition fingerprint0.4 g/kg dissolved · Hypotonic
Na⁺65
Ca²⁺18
HCO₃⁻95
◀ 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
  • Recoveryfatigue, stress

A gentle simple thermal spring pumped from beneath Osaka's Yodogawa ward. It is lightly mineralized at 0.38 g/kg of dissolved solids, yet nearly 95% of its anions are bicarbonate, which rounds out an already weakly alkaline, soft-on-the-skin feel. Metasilicic acid at 50 mg/kg brings it to the edge of Japan's beauty-water family, and the water itself carries a faint yellow tint while staying clear, tasteless and odorless. The posted analysis lists it for cold sensitivity and peripheral circulation problems, for fatigue recovery, and for stress-related complaints including insomnia and depressed mood.

Sampled at wellhead·Analyzed Jun 27, 2016·日本水処理工業株式会社

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About

An indoor bath holds a plain hot-water tub and a cold bath, but most of the bathing area is open to the sky: a jar bath, a jet bath, another plain-water tub, and a carbonated bath popular enough that people end up waiting their turn. The water is natural onsen water. The sauna carries a faint scent of herbs and seats around ten. The whole place sits on the ninth floor of a Shin-Osaka building, so the open-air tubs face rooftops and sky rather than any real scenery: planes on approach to Itami airport pass low overhead, trains rumble somewhere below, and at night the surrounding office lights take over. It's compact rather than grand, more urban perch than resort, the sort of spot locals and travelers staying nearby drop into for a soak.

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3.0

1 review

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Sergey M
1 year ago· edited

310. Hinata no Yu, Osaka ★ An onsen in an office building, 22 minutes from Osaka Station, for 880-1000. The layout also gives the feeling that a small office was turned into an onsen with baths on the balcony, but that is more of a feature than a drawback. The hours are listed as 06:00 to 01:00. They stamp the Kansai 41 Super Sento 24/25 stamp rally. There is a diner, massage, a foot bath, and massage chairs. The bath photos are from the internet, and the match is only approximate. Judging by the orientation of the objects, the photos seem to be from the women’s area, but it looks very similar to what it was like in the men’s area. 1. Outdoor area. Built on a large balcony of the office building, the city view is fairly limited, so it is definitely not the strong point, even though the official site mentions it. 1.1. Main bath with clear water, temperature 41-42. 1.2. Polygonal bubble bath, clear water, temperature 40-41. 1.3. Herbal bath (apparently an event bath). It had slightly greenish water with a smell, temperature 39-40. 1.4. Two barrels, clear water. 2. Indoor area. Easy to breathe, no chlorine smell. 2.1. Bath with clear water, temperature 42-43. 2.2. Sauna. 2.3. Cold bath. As for the bath quality and the onsen part, it is not a super interesting place, but the subtle atmosphere that the whole onsen was made inside an office building felt unusual and really caught my attention. The staff were friendly and attentive, and the woman at reception was worried that I would not have two 100 yen coins, one for the shoe locker and one for the locker in the changing room. 01.01.2025

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Last updated October 13, 2026