Here, OKUBO became aware of the importance of the matter, and after consulting people from the Satsuma Domain such as YOSHII and Takamori SAIGO who was staying in Kagoshima City, OKUBO presented a petition individually, arguing that when 'your domain (the Satsuma Domain)' sacrifices its life to save the 'empire's (Japan) crisis,' then it becomes possible to 'preach the justice to the world' and he also insisted that by stopping the coining of counterfeit money and revealing the truth, the Satsuma Domain would be able to have an advantage over other domains.
ここにおいて大久保も事の重大さを認識して、吉井や鹿児島市滞在中の西郷隆盛ら薩摩藩出身者と相談した上で大久保個人による形式で薩摩藩への建白書を提出して「皇国（日本）の安危興亡」を救うために「御国（薩摩藩）」が身を犠牲にすることで「天下に大義を唱える」ことが可能となることを論じて、直ちに贋貨鋳造を取りやめて事実を明らかにすることで、薩摩藩が他藩に対して優位に立てると主張したのである。