This situation would have been caused by the following reasons: The Kanto region, which was the base of the bakufu, was strongly controlled by the bakufu, and as the economy was based on silver in Saigoku (the western region of Japan), more paper money was used there.
関東地方は幕府のお膝下にあってその統制力は強く、また札遣いは銀遣い経済の地域である西国で盛んであったことなどが原因であろう。