Quick guide: Rinse before soaking, no swimsuits, keep towels out of the water, and enjoy quietly. Japanese onsens are for relaxation, not swimming. Start here: Onsen Rules in Japan: Complete Beginner’s Guide Before You Enter Wash thoroughly: Use the shower area to rinse and scrub before entering the bath. No swimsuits: Japanese onsen are nude bathing areas. Hair up: Keep long hair tied to avoid touching the water. Inside the Bath Keep towels out: Leave them on your head or beside the bath. Quiet atmosphere: Speak softly and relax. No photos: Cameras and phones are not allowed. Tattoos & Special ...