Little things

What’s something from your home country that’s completely normal that people frown upon or shied away from here?

Example, singing to music. I was in Shibuya station last night & this guy was singing and dancing a little bit to music he was listening to in his earphones. People actively started moving away from the door he was waiting at like he was disturbing the peace haha.

Are there any other little funny or quirky things that you’ve noticed that people give the cold shoulder to here?