Japan's Maritime Self-Defense Force (MSDF) will start on Friday its biggest maneuver this year, including joint exercises with the US Navy.
The 10-day drills in the Sea of Japan, Pacific Ocean and East China Sea are "an exercise held every year and strictly intended for improving skills of the units," Kyodo News quoted a senior MSDF officer as saying.
The MSDF will dispatch 80 ships, including the 7,250-ton destroyer Kirishima, which is equipped with the Aegis advanced air defense system and can share data with US vessels. About 10 war ships from the 7th Fleet of the US navy are to be involved, Kyodo said.
But the MSDF officer said the drills will not assume any imaginary enemy.
The exercises will also involve 170 aircraft, including reconnaissance planes and helicopters, and about 25,000 of the MSDF's 44,000 personnel, Kyodo said.
Drills will include combat scenarios involving antisubmarine, air defense and anti-ship warfare as well as maneuvers against unidentified ships.
There will also be exercises to practice rescue work at sea, aswell as inspection of ships by force.