Flight Narita International Airport departs from Tokyo Narita International Airport at 19:30 and arrives at Shanghai Pudong International Airport at 21:55.
The flighttime is about 3h 25m. The distance travelled ("as the bird flies"): 2092 Km. So the average speed is roughly 612 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 136.58% higher than on Monday. (Average prices, based on 164600 datapoints.)
We have a lot more statistics for flights HO 1400 and between Tokyo and Shanghai.