NHK has learned that at least one Chinese fighter jet, which aimed radar at Japan's Air Self-Defense Force aircraft on two occasions on Saturday, was roughly 52 kilometers away the first time and about 148 kilometers away the second time.
Japan's Defense Ministry says at least one Chinese J-15 jet intermittently aimed its radar at Japan's F-15s over international waters southeast of Okinawa's main island. The Chinese jet had taken off from the aircraft carrier Liaoning.
Sources stated that the distance between the fighter jets when radar was aimed was roughly 52 kilometers the first time and about 148 kilometers the second time.
Sources also said that the Chinese side had informed the Japanese side in advance that takeoff and landing exercises would be held on the carrier.
Japan has described directing radar at its aircraft as dangerous, while China has said it was standard procedure.
Japan's Defense Ministry is conducting further analyses of the circumstances and of China's intentions.

Quiz 1:
On which occasion was the Chinese fighter jet approximately 52 kilometers away from Japan's Air Self-Defense Force aircraft?
A. The first time
B. The second time
C. Both the first and second times
D. Neither the first nor the second time

Quiz 2:
Which type of Chinese jet was involved in the incident over international waters southeast of Okinawa's main island?
A. J-10
B. J-11
C. J-15
D. J-20

Quiz 3:
Where did the Chinese jet take off from on the day of the incident?
A. The mainland of China
B. Okinawa's main island
C. The aircraft carrier Liaoning
D. An unknown location