Flight Haneda Airport departs from Tokyo Haneda Airport at 15:00 and arrives at Osaka Kansai International Airport at 16:10.
The flighttime is about 1h 10m. The distance travelled ("as the bird flies"): 511 Km. So the average speed is roughly 438 Km.
The best day to arrive at Tokyo is Wednesday and it would be best to avoid Tuesday, as prices are on average 82.82% higher than on Wednesday. (Average prices, based on 6984902 datapoints.)
We have a lot more statistics for flights NH 31 and between Tokyo and Osaka.