Treaty of San Francisco, Signed at San Francisco on September 8, 1951; came into force on April 28, 1952.
Chapter II. Territory
(a) Japan recognizing the independence of Korea, renounces all right, title and claim to Korea, including the islands of Quelpart, Port Hamilton and Dagelet.
Quelpart is 済州島(Jeju-do). Port Hamilton is 巨文島 (Komundo). Dagelet is 鬱陵島 (Ulleungdo).
Therefore Japan didn’t renounce The Liancourt Rocks, also known as 竹島 (Takeshima) in Japanese and 独島 (Dokdo) in Korean and Japan has them.