The financial crisis of bakufu caused by natural disasters occurred one after another in this period such as Genroku Earthquake and Tokai, Nankai, Tonankai Consolidated Type Earthquake as well as damage by great eruption (of Mt.Fuji) in Hoei era was one of the reasons for minting ozeni (type of coin), or kaneitsukan, to make profit from zeniza.
またこの時期に相次いで起こった自然災害、すなわち元禄地震、東海・南海・東南海連動型地震および宝永の大噴火被害による幕府の財政逼迫も、銭座からの運上による利益を目的とする大銭すなわち寳永通寳鋳造に至らしめた一因といえる。