Japan's most acidic major spring, so hot it is cooled by hand with wooden paddles in a performance called yumomi.
Best time to visit
Aim for Dec–Mar, the 4 months that line up best.
Pairs well with
Frequently asked questions
When is the best time to visit Kusatsu Onsen?
The best time to visit Kusatsu Onsen is December–March, in Japan.
Where is Kusatsu Onsen?
Kusatsu Onsen is in Japan.
What is Kusatsu Onsen known for?
Japan's most acidic major spring, so hot it is cooled by hand with wooden paddles in a performance called yumomi.


