Flight Taipei Songshan Airport departs from Taipei Taipei Songshan Airport at 09:10 and arrives at Tokyo Haneda Airport at 13:20.
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 Sunday and it would be best to avoid Friday, as prices are on average 102.51% higher than on Sunday. (Average prices, based on 1706964 datapoints.)
We have a lot more statistics for flights JL 96 and between Taipei and Tokyo.