i have experienced on that, last 2 years kansai customs still using old method, take around 2 hours to clear custom
come out already 12am
left bus only, airport information counter still working, can ask them which exit to take bus
need buy ticket at the bus stop area first, then only queue wait for bus
bus only stop in selected area, last time my hotel in shin-osaka, bus stop in Umeda, after that take taxi, many taxi are waiting in the Umeda bus stop area