However, from around that time domestic cultivation of Korean ginseng became enabled as a part of policy in which new industry is encouraged by Yoshimune TOKUGAWA, and consequently, minting of Ninjindai Okogin declined.
しかしこの頃から、徳川吉宗による殖産興業の一環として進められた政策により高麗人参の国内栽培が可能となり、人参代往古銀の鋳造は衰退した。