Japan and the US have confirmed they are to hold a joint military drill at the end of the week.
The drill will take place off the coast of South Korea. It will begin on Friday and least until December 10th, according to a US military official.
"Keen Sword will cap the 50th anniversary of the Japan-US alliance as an 'alliance of equals'," explained Major William Vause, chief of operational plans, training and exercises.
He added: "It is the largest bilateral exercise between the United States and Japan military forces."
Meanwhile, South Korean officials have been invited to observe the drills for the first time, reports Yomiuri Shimbun newspaper.
It is expected that close to 34,000 Japanese military personnel 250 aircraft will take part in the drill, alongside 10,000 US troops and 150 aircraft.
Meanwhile, upi.com reports Japan has revealed plans to upgrade its Airborne Warning and Control System aircraft from Boeing.
Written by Mark Smith.