Onsen (hot springs) is one of the important cultures of Japan and it is popular among tourists as well. You can refresh your body in Onsen especially in the cold winter. In Outdoor Onsen where you can enjoy seeing views of great nature at the same time, will quickly ease your fatigue from your active adventure in Japan. Onsen’s water contain a lot of healthy components and rich in mineral. If you come to Japan, you should stay at a Ryokan (Japanese style hotel) with hot springs. At Most of Onsen spots, you have to be naked in hot spring, but recently there are some Onsen spots allow you to wear swimsuits.