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Tennen Onsen Naniwanoyu

天然温泉 なにわの湯てんねんおんせん なにわのゆ

Bathing Complex
Kansai·Osaka
06-6882-4126naniwanoyu.com

Day Use

Yes

Bathing & Water

Outdoor BathYes

Open-air outdoor bath

SaunaYes

Dry heat sauna room

OnsenYes

Uses natural hot spring water

Policies & Services

WashingYes

Shower, wash stations, soap and shampoo provided

天然温泉 浪花の湯

Tennen Onsen Naniwanoyu
塩
Chloride
+ Bicarbonate
Classification

Sodium Chloride spring

A sodium chloride-bicarbonate spring — salty chloride water layered with a softer bicarbonate finish, classified under the old nomenclature as 'gan-jūsō-shokuen-sen' (salt water with sodium bicarbonate). The wellhead emerges at a cool 33.7 °C (a 'low-temp' classification requiring reheating for bathing), and the water is weakly alkaline and gentle on the skin. With 88.4 mg/kg of metasilicic acid it carries the silica-driven smoothness associated with Japan's 'beauty-water' family, and at 1,124 mg/kg of dissolved solids it offers moderate body without overwhelming mineralization — a balanced urban onsen.

Source temperature
33.7°C
Low temp.
Tonicity
1.12g/kg
Hypotonic
Free CO₂
12mg/kg
Low
Highlights
  • High silica

Analyzed May 23, 2023·日本水処理工業株式会社·Cert no. 温泉成分分析機関 大阪府第5号

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SM
Sergey M
1 year ago

312. Tennen Onsen Naniwanoyu, Osaka Super sento with natural hot spring water, 15 minutes from Osaka station for 850-950. Operating hours listed as 10:00-01:00 (Mon-Fri) and 08:00-01:00 (Sat-Sun). They stamp the 41 Kansai Super Sento stamp rally 24/25. Has a restaurant, massage, massage chairs, and barber shop. Photos of the main outdoor baths from the internet, partially match — the water in the large bath also had a slightly brown tint in person. 1. Outdoor area. 1.1. Polygonal bath, slightly brownish clear water, temperature around 40. 1.2. Large stone bath, slightly brownish clear water, temperature around 40. 1.3. Three barrel baths. 1.4. Resting zone. 2. Indoor area. Breathing is okay, slight chlorine smell. 2.1. Three seated jet baths. 2.2. Three reclining jet baths. 2.3. Herbal bath, greenish-clear water, temperature around 40. 2.4. Main bath with clear water, temperature around 42. 2.5. Cold bath. There's a sauna and steam bath. A solid place, and considering the convenient location, worth considering for a visit in Osaka.