Slippers (スリッパの履き替え - Surippa)
The strict code of switching between 'hallway slippers', 'restroom-only slippers', and 'bare feet on Tatami mats'. Stepping onto a Tatami floor with slippers is a major cultural taboo.
Rooted in traditional spatial purity. Restrooms are considered spiritually impure, requiring dedicated toilet slippers; forgetting to switch back to hallway footwear is a highly embarrassing gaffe.
Politely ask the ryokan entry staff where to remove your outdoor shoes and secure indoor slippers.
What is the absolute foot hygiene rule when stepping onto a traditional Japanese Tatami mat room?