Flight Narita International Airport departs from Tokyo Narita International Airport at 14:00 and arrives at Wuhan Wuhan Tianhe International Airport at 17:45.
The flighttime is about 4h 45m. The distance travelled ("as the bird flies"): 2928 Km. So the average speed is roughly 616 Km.
There is an 1 hour time difference between Tokyo and Wuhan