Why does each station play a short cheerful melody when a train is about to leave?
Instead of a harsh buzzer, many stations play a brief, station-specific tune (hassha melody) to signal that doors are closing.
It's a safety signal redesigned to be pleasant: soft melodies calm the rush to board and reduce door accidents, and many are custom-made per station.
Why — five layers
Operators found harsh bells made people rush and stress; softer signature melodies were introduced to signal departure more gently.
Riders learn to associate the tune with 'doors closing now,' so the melody functions as a shared cue to stop rushing.
Composers and audio firms now make bespoke jingles; some tie into local themes or anime, turning a signal into station branding.
International view
Most countries use a plain chime or buzzer. Composed, station-unique departure tunes are distinctively common in Japan.
But not always
Not every line uses melodies; some still use simple bells or announcements, and busy metros may skip tunes entirely.
What to do
When the melody starts, it means doors are about to close, so don't dash for that train, wait for the next one.
Sources
- Rail operator departure-signal design notes