This article dealt briefly with U.S.-Japan relations and its alliance from 1945 to the present, and overviewed some features of the U.S.-Japan negotiation which took place in 2010 within a framework of Futenma’s U.S. Air base in Okinawa. New political factors which have exerted an influence upon on-going U.S.-Japan negotiations were described. In view of future US.-Japan relations, one conflict resolution method for Futenma’s U.S. Air base was reviewed. And for future collaborative schemes between Japan and the United States, the Green Power Partnership program initiated by the United States was singled out and resented.