The "Records of the Three Kingdoms", the earliest historical document with a reference to Japan, describes the Wa people, an ancient country of Yamatai, and its queen, Himiko. The "Record" indicates that when Himiko died her relative Iyo, a girl of thirteen, was made queen and sent a delegation of twenty officials under Yazuku, an imperial general, to offer tribute to the Northern Wei court. "The delegation visited the capital and [] offered to the court five thousand white gems and two pieces of carved jade, as well as twenty pieces of brocade with variegated designs." The carved jade in the "Record" likely describes a tribute of two jade magatama.