As opposed to koban, oban (obankin) (large-sized old Japanese gold coin) were also issued through the Edo period, it was not general currency but as reward grants and gifts in the standard of kin 1 mai (44 monme) and was traded not as counting currency but as oban market rate based of the karat, ryome and demand.
小判に対し、大判（大判金）も江戸時代を通して発行されていたが、大判は一般通貨ではなく、恩賞、贈答用のもので金一枚（四十四匁）という基準でつくられ、計数貨幣としてではなく、品位と量目および需要を基に大判大判相場によって取引された。