In Japan, Ministry of Environment certifies onsen, which efficacy and integrity are recognized to be superior, as “national health resort onsen” and utilizes it as dissemination activities so that more people can familiarize onsen. Shima Onsen is the commemorable first onsen among more than 90 national resort onsens, thus can be called as the onsen with reliability proven by history and records.
Moreover, most sources of Shima Onsen are natural seep, thus you can expose the whole body to fresh water with less oxidation. Temperature of onsen is 50-80 degrees Celsius. You can thoroughly warm up the core of your body and indulge in a moment of bliss. Majestic scenery surrounding open-air bath also becomes a feast for the eyes, thus it has huge popularity as a retreat.