Wokou (Chinese: 倭寇; pinyin: Wōkòu; Japanese: 倭寇; Hepburn: Wakō; Korean: 왜구; Hanja: 倭寇; RR: Waegu; Chinese transliteration: "dwarf bandits"), which translates to "Japanese pirates", were pirates who raided the coastlines of China and Korea from the 13th century to the 17th century.[1][2] The wokou were made of various ethnicities of East Asian ancestry, which varied over time and raided the mainland from islands in the Sea of Japan and East China Sea.[3] Wokou activity in Korea declined after the Treaty of Gyehae in 1443[1] but continued in Ming China and peaked during the Jiajing wokou raids in the mid-16th century. Chinese reprisals and strong clamp-downs on pirates by Japanese authorities saw the wokou disappear by the 17th century.