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island
one's territory (of a sex worker, organized crime gang, etc.); one's turf
夏休みに沖縄の島へ旅行しました。
I traveled to an island in Okinawa during summer vacation.
夏休みに沖縄の島に行きました。
I went to an island in Okinawa during summer vacation.
この島には美しいビーチがあります。
This island has beautiful beaches.