Flight Kansai International Airport departs from Osaka Kansai International Airport at 15:00 and arrives at Tokyo Narita International Airport at 16:15.
The flighttime is about 1h 15m. The distance travelled ("as the bird flies"): 582 Km. So the average speed is roughly 466 Km.
The best day to arrive at Osaka is Sunday and it would be best to avoid Friday, as prices are on average 52.12% higher than on Sunday. (Average prices, based on 8276952 datapoints.)
We have a lot more statistics for flights JL 224 and between Osaka and Tokyo.