As for this incident, there are various theories regarding the causes and consequences; Terumune ordered Masamune to shoot Yoshitsugu together with him; or it was a plot of Masamune to kill his father, judging from the fact that the troops of Masamune coming after the group of Hatakeyama was prepared with guns.
この事件は、輝宗が自分とともに義継を撃てと命じたとの説や追跡してきた政宗の軍勢がすでに鉄砲で武装していたことから、政宗の父殺しの陰謀だったとする説など発生原因も含めて諸説ある。