Yurushijo' is a documentation to permit the holder to give lessons to that holder's students and is different from 'menjo (diploma),' 'menkyo (license)' or 'dan-I (rank)' which implies the recognition of the receiver's ability.
「許状」は、稽古することを許可する趣旨の書面であり、実力認定の意味合いが強い「免状」「免許」「段位」などとは性格が異なる。