Flight Narita International Airport departs from Tokyo Narita International Airport at 22:10 and arrives at Taipei Taoyuan International Airport at 01:00.
The flighttime is about 3h 50m. The distance travelled ("as the bird flies"): 2260 Km. So the average speed is roughly 590 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 Thursday, as prices are on average 796.06% higher than on Saturday. (Average prices, based on 2123876 datapoints.)
We have a lot more statistics for flights MM 627 and between Tokyo and Taipei.