Kusatsu Onsen Named Most Popular Hot Spring in 2021

Kusatsu Onsen. (© Pixta)

Ōwakudani, Hakone. (© Pixta)

Okunoyu, Noboribetsu Onsen. (© Pixta)

Dōgo Onsen. (© Pixta)

Beppu Onsenkyō. (© Pixta)

Ashiyu foot bath at Nyūtō Onsen. (© Pixta)