Although the details while he was the family head is hardly known, it is supposed that it was Morihisa who took sides with Mitsunao ASHIKAGA of Sasagawa palace at the Eikyo War as the family head.
当主在任中の詳しい経緯はほとんどわかっていないが、永享の乱の際に篠川御所足利満直に従った際の当主は盛久と推定されている。