the itami terminal map shows it on the 3rd floor of the terminal building.. they have a web site, and offer rooms (all in japanese). airplane arrives about 1800, we are staying 10 days in kyoto then airplane leaves at 800. so we have booked hotel in kyoto for the balance of the trip. wife will want to be at airport by 6am

http://osaka-airport.co.jp/map/pdf/map.pdf

not very big. less than 50 rooms