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Usan-do ((朝鮮語:우산도), 于山島) is a historical name for an island in the Sea of Japan (East Sea) described in Korean records. It was part of the ancient state of Usan-guk, but its exact identity is disputed. It may refer to: * Ulleungdo * Jukdo, a Korean island 4 km east of Ulleungdo. == Old Korean maps of Usan-do == file:八道総図.jpg|Joseon map(1530) file:Ulleungdo and Usando.jpg|Joseon map(1530):Ulleungdo(鬱陵島) and Usan(于山島) file:DaedongyeojidoUlleungdo.png|Kim Jeong-ho "Daedongyeojido"(1861)：Ulleungdo(鬱陵島) and Usando(于山) file:East of Ulleungdo and Usando.jpg|Kim Jeong-ho "Daedongyeojido"(1861)：East of Ulleungdo(鬱陵島) and Usando(于山) file:DaehanJeondo.jpg|A map by Korean Empire:Ulleungdo(鬱陵島) and Usan(于山) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Usando」の詳細全文を読む スポンサード リンク
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