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Mumon ginsen (無文銀銭) (aka "Plain silver coin") is believed to be the earliest form of Japanese currency. Issued between 667 and 672 AD during the Tenji period, there are theories that mainly lean towards these coins being privately minted.
Mumon ginsen (無文銀銭) (aka "Plain silver coin") is believed to be the earliest form of Japanese currency. Issued between 667 and 672 AD during the Tenji period, there are theories that mainly lean towards these coins being privately minted.