Therefore, the copper for export was in short supply, and lowering of karat of gold and silver coin caused by reminting from keichokoban-keichochogin to genrokukoban-genrokuchogin and hoeikoban-hoeichogin as well as short supply of currency as a result of economic development caused appreciation of currency where 1 ryo(unit of currency) fluctuated around 3,700 mon (unit of currency) from the end of genroku era to the beginning of hoei era.
このため輸出用の御用銅は不足し、また慶長小判慶長丁銀から元禄小判元禄丁銀および宝永小判宝永丁銀への吹き替えによる金銀貨の品位低下および経済発展による銭貨不足から銭相場の高騰を招き、元禄年間終盤から宝永年間初頭にかけて、一両＝3,700文前後をつけるに至った。