Flight Haneda Airport departs from Tokyo Haneda Airport at 12:55 and arrives at Ishigaki Painushima Ishigaki Airport at 16:20.
The flighttime is about 12h 25m. The distance travelled ("as the bird flies"): 1917 Km. So the average speed is roughly 154 Km.
There is an 9 hour time difference between Tokyo and Ishigaki