Originally Posted by
Maji
If your incoming flight is delayed then the window gets compressed and it becomes more hairy.
If the incoming flight were delayed by 45 minutes, I think the OP would still likely make it onto the 10.30 bus. Customs and immigration at KIX is typicallly quick - especially for those who are first off the plane.
If the incoming flight were delayed by an hour or so the OP would still make it onto the 11.00AM bus and ETA at ITM would be 12.10PM. That's plenty of time to check-in and get onto a domestic flight - even allowing for some congestion on the roads.