In some communities there were traditionally many carpenters, while in other communities with smaller populations, it was natural that the residents would be proactive in supporting each other when building the framework of a house (framework raising) which is very labor intensive, and due to the social obligation called jubu-no-tsukiai (adequate relationship) those who did not cooperate may be ostracized or become "murahachibu."
地域の事情により古くから大工と言う職業が多数存在する地域もあったが、自治単位の人口の少ないところでは、十分の付き合い（相互扶助のこと村八分と言う言葉で知られる）の一つとして建前（上棟）には人手がいるためお互い様として地域住民が積極的に手伝う事が当然であった。