The most extensive mangrove forests of the Ryukyu Islands in East China Sea occur on Iriomote Island of the Yaeyama Islands , Okinawa , Japan .
Head entity: yaeyama islands Q696496 19 20
Tail entity: iriomote island Q432124 15 16
Relation (head \u2192 tail): P527
Inverse relation (tail \u2192 head): P361