While foreign ships threatened the Japanese coastal defense by appearing in waters around Japan, it is believed that Tadakuni was feeling a strong sense of danger against Edo bakufu that could not find any solution for loose management of finance which suffered a significant income decline in annual rice tax during the Ogosho (retired Shogun) period.
忠邦は異国船が日本近海に相次いで出没して日本の海防を脅かす一方、年貢米収入が激減し、一方で大御所時代のなか、放漫な財政に打つ手を見出せない江戸幕府に強い危機感を抱いていたとされる。