As described in the articles including "Shoku Nihongi" (Chronicle of Japan Continued), and its Senbun (letters engraved on coins), the first currency issued by Yamato kingship is Wado-kaichin (708).
『続日本紀』等の記事やその銭文が示すとおり、ヤマト王権が発行した最初の貨幣は和同開珎（708年）である。