Pyongyang, October 6 (KCNA) -- The U.S. and Japan are set to intensify military tie-ups in a bid to jointly launch aggression against other countries.

Japan's Air Self-Defense Force signed and exchanged with the U.S. forces a memorandum that envisions Japanese tanker's air fueling to the U.S. military planes during joint exercises with the U.S. forces, according to a data released on Oct. 3.

The U.S. forces have so far made air refueling to SDF fighters during joint exercises but never been supplied by the latter.

The bilateral military tie-ups are arousing vigilance.