Flight Guangzhou Baiyun International Airport departs from Guangzhou Guangzhou Baiyun International Airport at 09:10 and arrives at Tokyo Narita International Airport at 14:45.
The flighttime is about 4h 35m. The distance travelled ("as the bird flies"): 3109 Km. So the average speed is roughly 678 Km.
There is an 1 hour time difference between Guangzhou and Tokyo