Under the four-tiered hierarchy of government officials, there were Kanjin Zonin (lower-ranking government official), Shoryo (chief), Sanshi (court official in charge of calculation), Ko (workman [a craftsman in the "chojo" rank and a carpenter in the "banjo" rank]) and so on.
四等官の下には官人雑任・将領・算師・工（長上・番上）などが属していた。