A division which took on specific work names such as amabe and kaibe (dogs, birds, horses), each of which was led by the tomonomiyatsuko, and belonged to the Imperial Court.
海部（あまべ）、飼部（かいべ（犬・鳥・馬など））などのように具体的な仕事名を帯びる部のことで、それぞれ伴造に統率され、朝廷に所属する。