Existem muitos guias sobre a 'Rede que afirmam a necessidade de tranquilidade ao andar de trem. Exemplo :
People generally sit or stand in silence while on the trains as being too loud and disturbing other passengers is considered rude. This includes talking on your phone or having loud conversations. If you need to chat to your travel companion, do so in low voices. Also make sure your phone is on silent and that other people can’t hear the music you’re listening to or the game you’re playing.
Also, you'll find that most Japanese people do not talk loudly on the train. It's a good idea to follow their example and keep loud conversation to a minimum.
E assim por diante.