Flight Taoyuan International Airport departs from Taipei Taoyuan International Airport at 14:30 and arrives at Takamatsu Takamatsu Airport at 18:10.
The flighttime is about 2h 40m. The distance travelled ("as the bird flies"): 1547 Km. So the average speed is roughly 580 Km.
There is an 1 hour time difference between Taipei and Takamatsu