Shocked by the arrival of the naval squadron commanded by Commodore Matthew PERRY in 1853, he submitted a written opinion to Masayoshi HOTTA, the lord of the Sakura Domain, and also presented the measures for naval defense to a senior councilor Masahiro ABE.
1853年（嘉永6）、マシュー・ペリー艦隊の来航に衝撃を受け佐倉藩主の堀田正睦に意見書を提出し、老中の阿部正弘にも海防策を献じた。