Shimazu Yoshihiro
On 15 December, about 20,000 Japanese troops from the "wajō" of Sach'on, Goseong, and Namhae boarded 500 ships and began to mass east of the Noryang Strait in an attempt to break the allied blockade of Sunch'on. The overall commander of this relief force was Shimazu Yoshihiro, the leader of the Sach'on "wajō".