In an emergency, such a 'Buke no toryo' was appointed tsuitoshi, and the leader mobilized samurai under 'Ikkoku toryo' with whom he had a master-servant relationship, to carry out necessary military activities.
有事の際にはこうした「武家の棟梁」が追討使に補任され、主従関係を結んでいる「一国棟梁」以下の武士を動員し、軍事活動を展開したのである。