At the beginning of the 16th century, Daimyo (Japanese territorial lord) in the Sengoku Period came to appoint powerful Toryo as Daiku (head of builders) (Kunidaiku/Gundaiku) of the Daimyos' own territory and let them control the Bansho in the territory.
16世紀に入ると戦国大名が有力な棟梁を領国の大工（国大工・郡大工）に任じて領内の番匠を統率させるようになる。