Flight Haneda Airport departs from Tokyo Haneda Airport at 08:40 and arrives at Guangzhou Guangzhou Baiyun International Airport at 13:05.
The flighttime is about 5h 25m. The distance travelled ("as the bird flies"): 3038 Km. So the average speed is roughly 561 Km.
There is an 1 hour time difference between Tokyo and Guangzhou