Tokyo's Haneda airport was operating in mixed mode - with both departures and arrivals on the same runway - at the time of the collision involving a landing Japan Airlines Airbus A350-900. But the circumstances of the accident, in which the A350 struck a Japanese Coast Guard Bombardier Dash 8-300 ...
ATC audio was leaked, Dash 8s pilot mistook instructions to wait and proceeded to the runway where JAL A350 was landing.