Tadasaburo SASAKI, who was Kumigashira (the leader) of the Sagami no kami brigade, and Kichitaro WATANABE, Yasujiro TAKAHASHI, Hayanosuke KATSURA, Nakazo DOHI, Daizaburo SAKURAI, and Nobuo IMAI are regarded as likely perpetrators of the assassination of Ryoma SAKAMOTO.
相模組与頭の佐々木只三郎、渡辺吉太郎、高橋安二郎、桂早之助、土肥仲蔵、桜井大三郎、今井信郎らが坂本龍馬暗殺の実行犯として有力とされる。