Flight Narita International Airport departs from Tokyo Narita International Airport at 22:30 and arrives at Kuala Lumpur Kuala Lumpur International Airport at 04:55.
The flighttime is about 7h 25m. The distance travelled ("as the bird flies"): 4552 Km. So the average speed is roughly 614 Km.
There is an 1 hour time difference between Tokyo and Kuala Lumpur