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In page Ryukyuans:

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"Ryukyu" is an other name from the Chinese side, and "Okinawa" is a Japanese cognate of Okinawa's indigenous name "Uchinā", originating from the residents of the main island referring to the main island against the surrounding islands, Miyako and Yaeyama.[8] Mainland Japanese adapted Okinawa as the way to call these people.[citation needed]