"This is absolutely unacceptable, given our position concerning the sovereignty of Takeshima. This is very upsetting," the Japanese government said as quoted by the Kyodo news agency.
The agency reported that Tokyo had requested Seoul via diplomatic channels to abandon the drills, which start on Monday.
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According to the South Korean Yonhap news agency, P-3 Orion maritime patrol aircraft, Sikorsky UH-60 Black Hawk helicopters, F-15K destroyers and other military equipment are engaged in Seoul’s two-day drills. During the exercise, held by the South Korean forces twice a year since 1986, marine corps are deployed on the Liancourt Rocks.
The Liancourt Rocks have been administered by South Korea since 1954, but Japan has been disputing Seoul’s sovereignty over the territory due to historical reasons.