When at a ryokan, immediately change into the yukata , the Japanese robe, to look like a local. It is common to wear it anywhere in the inn, including when you sleep. The right side goes under the left side and the belt. or obi , is wrapped around the waist twice and tied in the front. Men rotate the belt so the knot is over the left buttocks. Wear it low to look real cool. A yukata is great to sleep in but be warned, when you wake the front will be wide open.