Flight Kansai International Airport departs from Osaka Kansai International Airport at 18:30 and arrives at Tokyo Narita International Airport at 20:05.
The flighttime is about 1h 35m. The distance travelled ("as the bird flies"): 582 Km. So the average speed is roughly 368 Km.
The best day to arrive at Osaka is Sunday and it would be best to avoid Thursday, as prices are on average 115.87% higher than on Sunday. (Average prices, based on 8320259 datapoints.)
We have a lot more statistics for flights JQ 224 and between Osaka and Tokyo.