The attackers, with the "Bukan" (a book of heraldry) in their hands, disguised themselves as onlookers of a daimyo palanquin and waited for Naosuke's palanquin to pass.
襲撃者たちは『武鑑』を手にして大名駕籠見物を装い、直弼の駕籠を待っていた。