They originally belonged to the construction-related government officials (Shurishiki (repair offices), Mokuryo (Bureau of Carpentry), Zojishi (provisional government office for construction and repair of the governmental temples) and so on) and the local authorities (Kokuga (provincial government offices), Kokubun-ji (provincial monasteries and so on) and, if needed, made trips for work, and when the Kamakura period started, free Bansho who did not belong to any organization increased in number centering around urban areas, which resulted in keen competition among Bansho, thus Daikushiki was established from the 13th to 14th century as a system to control the contracting rights for work.
元は建築関連の官司（修理職・木工寮・造寺司など）や地方機関（国衙・国分寺など）などに所属し、必要に応じて他所に出作していたが、鎌倉時代に入ると都市を中心として特定の組織に属しない散在工が増加し、番匠間に競争が激化したため、13世紀から14世紀にかけて作事請負権を掌る職の体系として大工職が成立した。