1 kanmon = 2 koku (before the introduction of kokudaka system [tax and salary system based on the annual yield of rice by koku], the warload's territory was sometimes rated with kandaka system [a system to measure the amount of rice production based on the land size by sen]).
1貫文2石（武将の領地を、石高制になるまでは銭による貫高制で表すことがあった）