Queen Airlines Flight 510 (Q-510) was a flight that was bound for New Chitose Airport in Sapporo from Haneda Airport in Tokyo. The flight was hijacked on February 29, 2008, sending the plane crashing into Iriai Coast, in the southeastern portion of Yūyami City. Everyone onboard was killed except the alleged hijacker, Kirio Imizuka, whose identity remained undisclosed as he was a minor at the time.
Ryō Kurisu was to be a passenger on this flight, along with a priest who had looked after him when he was younger, but the priest became ill and Kurisu cancelled their trip. Kirio took his seat on the plane, A24.