Take Advantage Of Special Restroom Slippers
In Japan, it is customary to take your shoes off before entering someone’s home. That is to say if you get invited. It is common to find a set of slippers in front of the restroom when you visit a friend’s home or a restaurant. You should use them while you are in the restroom then return as you found them.
You want to ensure the next person has something to use, after all. If you should fail to return these slippers to their original position, well, don’t. It is frowned upon and can lead to some embarrassing stares if you walk outside of the restroom with them on. Now you wouldn’t want that, would you?