We noticed that you're using an unsupported browser. The TripAdvisor website may not display properly.We support the following browsers: Windows: Internet Explorer, Mozilla Firefox, Google Chrome. Mac: Safari.
The onsen jewel of Japan has to be the Sennin-buro. This giant rotenburo (outdoor bath), created by damming the Oto River, measures about 120m (length) by 40m (width). It was washed away by a flood on 14 Dec. It took a week to rebuilt.
Ask MuseFaery about Senninburo
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.