In the Tensho era (1573 to 1592), 1 ryo was almost equal to the following things in value, that is, 4 koku of rice, 1 kanmon (former Japanese currency unit) of Eiraku Tsuho (Yong Le Tong Bao in pinyin, a copper coin minted in Ming dynasty China), and 4 kanmon of bad copper coins.
天正年間の1両は米4石(単位)、永楽通宝1貫文、鐚銭4貫文とほぼ等価であった。