Flight Taipei Songshan Airport departs from Taipei Taipei Songshan Airport at 18:05 and arrives at Tokyo Haneda Airport at 22:15.
The flighttime is about 4h 10m. The distance travelled ("as the bird flies"): 2157 Km. So the average speed is roughly 518 Km.
The best day to arrive at Taipei is Saturday and it would be best to avoid Tuesday, as prices are on average 76.41% higher than on Saturday. (Average prices, based on 1827504 datapoints.)
We have a lot more statistics for flights CI 222 and between Taipei and Tokyo.
