JASDF Matsushima Air Base, is a military aerodrome of the Japan Air Self-Defense Force located in Higashimatsushima, 6.6 NM west of Ishinomaki in the Miyagi Prefecture, Japan, it's the home of the JASDF 21st Fighter Training Squadron, currently equipped with which multirole fighter derived from the General Dynamics F-16 Fighting Falcon, and manufactured by Mitsubishi Heavy Industries and Lockheed Martin for the Japan Air Self-Defense Force, with a 60/40 split in manufacturing between Japan and the United States?