Onsen OniOnsen Oni

Tade Ka Onsen Shō Hitoshi No Yu

蓼科温泉 小斉の湯たでかおんせん しょうひとしのゆ

Other
Tateshina Onsen
Chubu·Nagano
0266-67-2121

Day Use

Yes

Bathing & Water

Outdoor BathYes

Open-air outdoor bath

OnsenYes

Uses natural hot spring water

Capabilities

Private BathYes

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

Policies & Services

TattooYes

Allows entry with visible tattoos

Unverified

WashingYes

Shower, wash stations, soap and shampoo provided

TowelsYes

Towels available to rent or borrow

Water treatment

from Article 18 disclosure
  • Added water
    Yes
  • Reheated
    Not disclosed
  • Recirculated
    Not disclosed
  • Disinfected
    Not disclosed
  • Bath additives
    Not disclosed

蓼科三室源泉

Tateshina Mimuro Spring

Mixed source

塩
Chloride
+ Sulfate

An acidic sodium chloride-sulfate spring — weakly acidic, hypotonic, and notably hot at the wellhead (62.6 C, among Japan's hottest natural sources). The chloride lead gives a salty, heat-retaining body, layered with quiet sulfate depth. The supplier dilutes the water with cold water before it reaches the bath because the source itself is too hot to enter directly.

Source temperature
62.6°C
Hot
Tonicity
Hypotonic
 
Highlights
  • Top-decile hot

Analyzed Jun 20, 2004·長野県衛生公害研究所

Views

Mountains

Loading map…

MA
Mariia
1 year ago

Higaeri near work. Founded ages ago. The sign said it's the only acidic high-altitude hot onsen in Nagano Prefecture, with acidity comparable to Kusatsu. Kakenagashi, diluted with water since the source temperature is 62 degrees. 700 yen; for an additional 800 yen you can get a kashikiri bath. Two women's and two men's rotenburo, but in winter only two operate. The rotenburo pool is split in half — one side feels like 39, the other 42. The photo shows the view from the women's rotenburo; the men's one apparently has no fence. Note: the indoor and outdoor baths are in different locations (it's quite a walk to the rotenburo). If visiting both, you need to go to the indoor bath first, then get dressed again and walk to the outdoor one. Showers are only in the indoor area; the outdoor one has two hot/cold water taps. Shampoo is provided, but washing up in the cold is quite a challenge.