Just some sharing for anyone who's taking AirAsia to Osaka. I just arrived last night, and the flight was on time - 10.25pm arrival at KIX. However, maybe because it was a Saturday, I queued for 2 hours at immigration as there were too many arrivals! So I missed the Nankai airport express train to Namba and also the midnight bus to Nankai-Namba station. I managed to get a ticket but the bus attendant refunded me the money as there was insufficient buses for the queue, so we had to take the buses to Osaka station instead. The queue for those buses were just as long. Took a cab to Namba which cost 1950 JPY for a 10 min ride hehe. Entire experience from getting off the plane and getting to my room took me 3.5 hours

Good idea!