Since he devised stratagems for the problems on imperial sanction on treaties and the Shogun's successor, he was severely interrogated from the bakufu during Ansei no Taigoku, but because he surrendered voluntarily, the charges against him were relatively light.
条約勅許問題や将軍後継問題などで策謀を巡らせたため、安政の大獄において幕府からの厳しい追及を受けたが、観念して自首したために比較的軽い罪になった。