Although the number of retainers on Kira's side is uncertain, as there are various theories, the book written by bakufu coroners after the raid stated that 'there were 89 chugen and komono (ranks below common soldier).'
吉良家臣の数は諸説あってはっきりとしていないが、討ち入り後の幕府の検死役の書に「中間小物共八十九人」と書かれている。