Flight Narita International Airport departs from Tokyo Narita International Airport at 08:55 and arrives at Shanghai Pudong International Airport at 11:05.
The flighttime is about 3h 10m. The distance travelled ("as the bird flies"): 2092 Km. So the average speed is roughly 661 Km.
There is an 1 hour time difference between Tokyo and Shanghai
The best day to arrive at Tokyo is Monday and it would be best to avoid Saturday, as prices are on average 45.83% higher than on Monday. (Average prices, based on 80602 datapoints.)
We have a lot more statistics for flights CA 158 and between Tokyo and Shanghai.