Also among the servants who belonged to the family organization of bushi during the early period, there were the roto who fought as cavalry warriors in the battlefield like bushi or jusotsu (officer's servants) who fought on foot, but in the Muromachi and Sengoku period the samurai status spread increasingly and jizamurai (local samurai), originally coming from the class of farmers, as bushi in a broad sense appeared by having a relationship between lord and vassal through the military service for the class of myoshu (owner of rice fields) of shoryo governed by the bushi in a narrow sense, as well as the master-subordinate relationship of the bushi in a narrow sense.
発生期の武士の家組織の内部奉公人の中においても武士と同様に戦場では騎馬戦士として活動した郎党や、徒歩で戦った従卒がいたが、室町・戦国期になると武士身分の拡散が大きくなり、狭義の武士同士の主従関係のほかに、本来は百姓身分でありながら狭義の武士の支配する所領の名主層から軍役を通じて主従関係を持つようになった広義の武士としての地侍などが登場する。