Flight Hangzhou Xiaoshan International Airport departs from Hangzhou Hangzhou Xiaoshan International Airport at 13:45 and arrives at Tokyo Haneda Airport at 18:00.
The flighttime is about 3h 15m. The distance travelled ("as the bird flies"): 2181 Km. So the average speed is roughly 671 Km.
There is an 1 hour time difference between Hangzhou and Tokyo