Flight Kuala Lumpur International Airport departs from Kuala Lumpur Kuala Lumpur International Airport at 22:50 and arrives at Tokyo Narita International Airport at 06:35.
The flighttime is about 6h 45m. The distance travelled ("as the bird flies"): 4552 Km. So the average speed is roughly 674 Km.
There is an 1 hour time difference between Kuala Lumpur and Tokyo