Onsen  are natural hot spring baths.// If you want to visit an onsen, you should know some rules of etiquette for onsen.// First, you must remember to clean yourself before you get into the bathtub.// Then you can take a small towel into the bathroom with you, but you mustn’t let it go in the bathtub.// After enjoying bathing, you can dry yourself with a large towel in the changing room.//