
China Coast Guard vessels were seen in the contiguous zone off the Senkaku Islands in Okinawa Prefecture's Ishigakijima on 332 days in 2021, the second-highest number of days since Japan nationalized the islands in 2012, according to the 11th Regional Coast Guard Headquarters in Naha.
A record 333 days were marked in 2020.
The ships operated in the zone for a record 157 consecutive days between February and July 2021.

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