Respect and restraint are deeply woven in Japanese culture. A few small gestures can go a long way toward showing appreciation and courtesy.
You’ll often need to remove your shoes when entering homes, some restaurants, temples, traditional accommodations and even some store changing rooms. It’s to keep spaces clean and to show respect, and it is seen as rude and unhygienic not to do so. Carry clean socks or bring easy-to-remove shoes.
Eating or drinking while walking (or riding the train) is considered impolite. Eat or drink in designated areas or near vending machines.
For transactions, place your money or card on the offered tray instead of handing it over when you shop at any store.
While there are no strict rules, Tokyo locals tend to dress neatly and modestly, oiding revealing or sloppy clothes, especially at temples and formal settings.
Be quiet on trains: no loud talking or phone calls.