Some time ago I tried to research the same question, but without much success. According to the sources I found, the number of Japanese planes on Okinawa itself was relatively small, the majority was based on Kyushu. Nonetheless on 27, 28 and 29 March aircraft from Kadena airfield on Okinawa flew kamikaze missions and damaged some American ships.
If you want more detailed information, you should ask the people at j-aircraft:
http://www.j-aircraft.org/smf/index.php