• Sainokawara Open-Air Bath image1
  • Sainokawara Open-Air Bath image2
  • Sainokawara Open-Air Bath image3
  • Sainokawara Open-Air Bath image4
  • Sainokawara Open-Air Bath image5
  • Sainokawara Open-Air Bath image6
  • Sainokawara Open-Air Bath image7
Hot Spring / Hot Spring Bath

Sainokawara Open-Air Bath


Sainokawara Open-Air Bath is one of Japan’s largest open-air baths nestled within wide open natural splendor. Here you can enjoy all the changes of the seasons from the fresh verdure in early summer, to the changing color of the leaves in autumn, and the snowy landscapes in the winter. And in the evenings, gaze at the night sky full of stars. The source of the hot spring is an ever hot well, almost as hot as magma, from within Kusastu Onsen. Because the water temperature is as high as about 95 degrees the spring water has an anti-inflammatory and sterilizing effect. It is also beneficial for burns and those suffering from nerve pains. There are separate changing rooms for both men and women but no washing facilities.

Gunma Pref. Agatsumagunkusatsumachi Kusatsu 521-3
[Apr.-Nov.] 7:00-20:00 (until Latest entry 19:30)[Dec.-Mar.] 9:00-20:00 (until Latest entry 19:30)
open everyday (Maintenance closed once a year)
[Bathing charge] Adults600yen, Child 300yen
Credit Card
Not available
Temporary closure:Currently closed (information as of May 7, 2020)* Information may be changed, so please be sure to check the official information.
Updated at: May 25, 2020 Information Sources: NAVITIME JAPAN


  • Reviewed
    Beautiful outdoor bath

    I visited 1st time here. I enjoyed beautiful and fantastic outdoor bath. It’s located west side from Yubatake 湯畑, it takes around 10-15 min. by walking. Emerald green, big bath,,, it’s really... more

    Date of visit:
  • Reviewed
    Good outdoor bath

    The pool is large and well set up with rocks, the view is up the sides of the valley. It doesnt offer views into the valley below. Walking up the valley from the towns centre takes about fifteen... more

    Date of visit:
  • Reviewed
    The best outdoor bath 最高の露天風呂

    It is a very big outdoor bath along the river. The hot water is good and the scenery is also the best. There is no washing place, so it is attention because it is only hot... more

    Date of visit:
  • Reviewed
    A very nice open bath

    The open bath is really nice. I came on early fall at night around 6 PM. Its really nice to take a bath when the temperature is cool. The water wasnt very hot. But if you come closer to the water... more

    Date of visit:
  • Reviewed
    Beautiful Outdoor Bath

    This is a very nice place to enjoy the onsen in Kusatsu, the pool is huge and the nature around is beautiful. To get to the onsen you have to have a short walk through the park bubbling with hot... more

    Date of visit:
TripAdvisor Traveler Rating



Sorry, no content matched your criteria.