Flight Haneda Airport departs from Tokyo Haneda Airport at 12:40 and arrives at Taipei Taipei Songshan Airport at 15:05.
The flighttime is about 11h 25m. The distance travelled ("as the bird flies"): 2157 Km. So the average speed is roughly 189 Km.
There is an 9 hour time difference between Tokyo and Taipei
The best day to arrive at Tokyo is Friday and it would be best to avoid Wednesday, as prices are on average 177.42% higher than on Friday. (Average prices, based on 9750772 datapoints.)
We have a lot more statistics for flights BR 191 and between Tokyo and Taipei.