At the end of 17th century when lower-quality Genroku Koban (oval gold coins) and Genroku chogin (oval silver coins) were issued, the calling-back of ryogoku kahei by kin-zas (organizations in charge of casting and appraising of gold during the Edo period) and gin-zas (organizations in charge of casting and appraising of silver during the Edo period) made progress and the unification of currency was achieved at long last.
17世紀末の品位を低下させた元禄小判元禄丁銀を発行するに至り、ようやく金座および銀座(歴史)による領国貨幣の回収が進行し通貨統一が達成された。