While you may be accustomed to chatting with your traveling companions while using public transportation, this is not the norm in Japan. Loud chatter or other disturbance is considered rude. You may notice that most Japanese train passengers stand or sit in silence.

In Japanese culture, it is considered impolite to speak loudly or have animated conversations on subways and commuter trains. While talking quietly with a companion is generally acceptable, the "Gold Standard" of behavior is to remain silent to respect the shared space of other passengers. In 2026, the most significant social "taboo" is talking on a mobile phone; you will notice that almost everyone has their phone set to "Manner Mode" (silent), and taking a voice call is strictly discouraged by both social custom and overhead announcements. If you must answer a call, the polite thing to do is to answer briefly, whisper that you are on the train, and hang up immediately. This culture of silence allows commuters to rest, read, or use their devices in peace without being disturbed by the private business of others. For tourists, following this "quiet rule" is one of the easiest ways to show respect for local etiquette and blend in with the residents during the daily rush hour in cities like Tokyo and Osaka.