The group of assassins consisted of 6 sizoku: 5 from Ishikawa Prefecture, Ichiro SHIMADA, Tsurahide CHO, Otogiku SUGIMOTO, Koichi WAKITA, and Bunichi SUGIMURA; and 1from Shimane Prefecture, Toshiatsu ASAI (Wakita quit the shizoku and became a commoner prior to leaving for Tokyo due to fear of punishment to his family for his conduct).
暗殺犯は石川県士族島田一郎・長連豪・杉本乙菊・脇田巧一・杉村文一および島根県士族の浅井寿篤の6名から成る（脇田は上京にあたり罪が家に及ぶのを恐れて士族を辞めて平民になっている）。