Japan's air forces and U.S. UCAV strategies
Mitsubishi Heavy is a licensed producer and integrator of (among others) the F-15 and Aegis system on behalf of Japan's Self Defence Force. Its most controversial project has been the FS-X / F-2 fighter project, a domestically designed air superiority fighter incorporating some US technologies.
A general description of the plane and the controversy can be found at FAS. Basically, the entire project became ensnarled in a Congressional controversy regarding technology leakage to Japan, based on issues of both civilian competitiveness and military security.
A more recent update on the F-2 situation was presented at a GLOCOM conference on the general US/Japan strategy situation in early 2001.
According to port of this survey of US/Japan relations in the context of the 2000 election, the F-2 has been several times delayed in entering production and deployment. So, it's probably understandable if MHI and other Japanese defense companies become concerned if after all of this, Rumsfeld starts initiatives to cut resources to our F-22, and divert to unmanned aircraft. MHI and Japan were presumably already facing an issue of obtaining access to some of the US stealth technologies in order to build an F-22 clone or competitor - now there is the spectre of the US leaping two generations ahead.