Japanese Old Coin

The Wado Kaichin (Wado Kaichin/Wado Kaihou) was Japan’s first metal coin, issued in 708 (the first year of the Wado era). It was the first coin of the Imperial Twelve Coins series and was once considered Japan’s oldest cast coin, but with the discovery of the Fuhon sen(coin), it is now recognized as “Japan’s oldest circulating coin.”

Kan’ei Tsuuho was a widely circulated coin during the Edo period in Japan.
It was first minted in 1636 and continued to be minted until the end of the Edo period.
The classification by age is mainly divided into two categories, which are called”Ko(Old)-Kanei Sen” and “Shin(New)-Kanei Sen”.

(Please have a look at the link below.)
⇒Page about the classification of Shin(New)-Kanei Sen(coin)

These coins are said to have been provided to craftsmen during the construction of the Odaiba at the end of the Edo period.
It is an unidentified coin that we do not know if it ever really existed.

(Please have a look at the link below.)
⇒Daiba Tsuho 250 Mon Coin imaginary money Japanese Old Coin