The official court ranks, called mokan (blind official ranks) in todoza, were from kengyo, the highest rank to betto, koto and zato in hierarchical order, and each rank was subdivided and there were 73 ranks.
座中の官位（盲官と呼ばれる）は、最高位の検校から順に、別当、勾当、座頭と呼ばれていたが、それぞれは更に細分化されており合計73個の位があった。