The United States has voiced reluctance over Japan's proposal to temporarily relocate MV-22 Osprey military transport aircraft from a U.S. base in Okinawa Prefecture to Saga airport, sources said Thursday.
The United States cited reasons such as difficulties in redeploying troops and securing a training area, the sources added.
The government of Prime Minister Shinzo Abe had hoped to make the proposal a centerpiece of efforts to ease the burden on Okinawa from hosting the bulk of U.S. military forces in Japan.