Afghanistan, Dec. 11 -- Japan and the United States conducted a joint military drill featuring U.S. B-52 bombers, underscoring deepening defense cooperation amid rising regional security tensions.

Japan has carried out joint military exercises with the United States as regional tensions escalate across East Asia. The drills, held on Wednesday, come at a time when Tokyo is deepening security cooperation with Washington in response to what it calls an increasingly "severe" strategic environment.

Japan's defence ministry said two U.S. Air Force B-52 strategic bombers took part in the exercise, describing the manoeuvres as part of ongoing efforts to enhance interoperability between the two allies. Officials in Tokyo say such coordination is v...