Flight Haneda Airport departs from Tokyo Haneda Airport at 20:55 and arrives at Osaka Kansai International Airport at 22:20.
The flighttime is about 1h 25m. The distance travelled ("as the bird flies"): 511 Km. So the average speed is roughly 361 Km.
The best day to arrive at Tokyo is Sunday and it would be best to avoid Friday, as prices are on average 142.29% higher than on Sunday. (Average prices, based on 7411626 datapoints.)
We have a lot more statistics for flights JL 229 and between Tokyo and Osaka.
