Don't put your bag on a free train seat. That should be a universal thing.

Don't try on clothes without a face cover. This prevents makeup from staining the material.

Don't pull open the taxi door. Japan's living in 3020, remember? They open automatically.

No talking on the phone on public transport. You will get judgy stares.

Don't stand on the wrong side of the escalator. Keep left if you're not in a hurry.

Don't leave your backpack on inside public transport. No one wants a backpack in the face.

Don't blow your nose in public. It's bad manners and just kinda gross. Sniffle it back in or go to the bathroom to let those boogers out.

Don't bargain the price. It's not like the other Asian countries. In Japan most things are legit.

Don't expect everyone to know English. Try to learn some Japanese.

Don't walk into fitting rooms with shoes on. Take them off before entering to keep everything clean.

Don't poke or squeeze fresh produce at supermarkets. Trust me, they only put out the best ones, just grab and go.

Don't place money directly into the cashier's hands. Put it on a tray.

Don't eat or drink while walking. Drinking coffee counts too. You will get judgy stares.

Don't go barefoot or wear house slippers into the toilet. Use toilet slippers.

Don't get into PDA. Just save it for the hotel room, okay?