Flight Narita International Airport departs from Tokyo Narita International Airport at 14:00 and arrives at Taipei Taoyuan International Airport at 17:05.
The flighttime is about 4h 05m. The distance travelled ("as the bird flies"): 2260 Km. So the average speed is roughly 553 Km.
There is an 1 hour time difference between Tokyo and Taipei
The best day to arrive at Tokyo is Saturday and it would be best to avoid Friday, as prices are on average 377.81% higher than on Saturday. (Average prices, based on 2210322 datapoints.)
We have a lot more statistics for flights BR 197 and between Tokyo and Taipei.