Place it at the very end of a scene, after the last line and any door knocking, so it closes the moment cleanly. Follow it with a Vine Boom Sound Effect only when you want the cutoff to hit harder, and leave the next clip to start on a fresh beat.
About this sound
This 3.4-second clip is a calm, formal Japanese announcement that the doors are closing, delivered in the clear, polite voice of a station or train message. It gives a listener a small jolt of closure, as if a chance has just slipped away at the last second. The phrase is widely recognised from trains, subways and elevators in Japan.