Natural Hot Spring Suisaikaku is an onsen ryokan in Kochi City, Kochi Prefecture. You can enjoy high-quality natural hot spring water that wells up in the castle town of Kochi in open-air baths with a sense of openness and spacious indoor baths. After working up a good sweat in the dry sauna, refresh in the pleasant cold plunge bath located next to the sauna room. The outdoor area features a large single-slab rock bench where you can relax and enjoy outdoor cooling while feeling the breeze. This is a well-equipped bathing facility that also accepts day-use visitors.