[3] Masakage contributed very highly to the Date clan by defending it from many oppositions.

He was participate at the Siege of Hasedō in 1600,[2] also involved in the succession dispute.

Masakage was extremely close to Masamune, as one of his top subordinates, bringing him to many victories.

The greatest victory he brought to Masamune was in the "Kasai-Osaki Uprising" or Ōshū campaign along with Yashiro Kageyori.

In NHK's 1987 Taiga drama Dokuganryū Masamune, Masakage was played by Kyōzō Nagatsuka.