Flight Narita International Airport departs from Tokyo Narita International Airport at 16:10 and arrives at Osaka Kansai International Airport at 17:50.
The flighttime is about 1h 40m. The distance travelled ("as the bird flies"): 582 Km. So the average speed is roughly 349 Km.
The best day to arrive at Tokyo is Saturday and it would be best to avoid Sunday, as prices are on average 125.73% higher than on Saturday. (Average prices, based on 3369612 datapoints.)
We have a lot more statistics for flights JQ 225 and between Tokyo and Osaka.