Flight Haneda Airport departs from Tokyo Haneda Airport at 08:55 and arrives at Taipei Taipei Songshan Airport at 11:35.
The flighttime is about 11h 40m. The distance travelled ("as the bird flies"): 2157 Km. So the average speed is roughly 185 Km.
There is an 9 hour time difference between Tokyo and Taipei
The best day to arrive at Tokyo is Sunday and it would be best to avoid Monday, as prices are on average 898.12% higher than on Sunday. (Average prices, based on 10102792 datapoints.)
We have a lot more statistics for flights JL 97 and between Tokyo and Taipei.