With his father and older brother, he fought in the Zen Kunen no Eki (Former Nine Years' Campaign), where his distinguished service led to his appointment to the rank of Uemon no jo (the third ranked official of the Right Division of Outer Palace Guards) on March 28, 1058.
父や兄と共に前九年の役で戦い、その勲功を賞され天喜6年（1058年）2月25日に右衛門尉へと任ぜられる。