Usando

Usan-do (Korean: 우산도, 于山島) is a historical name for an island in the Sea of Japan described in Korean records. It was part of the ancient state of Usan-guk, but its exact identity is disputed. It may refer to:

• Jukdo, a Korean island 4 km east of Ulleungdo.
• The Liancourt Rocks, a disputed group of islets now known as Dokdo in Korea and Takeshima in Japan.