Generally, he is known as "Hitokiri Gensai" (Gensai the killer); however, the only person he actually killed was Shozan SAKUMA, and it is unknown as to when, who and how many people he killed thereafter.
一般的に「人斬り彦斎」などと呼ばれているが、彦斎が斬った人物で確実なのは佐久間象山だけで、後はいつ誰を何人斬ったのかは明確に伝わっていない。