As the author of the original "Vengeance for Sale," he used the pen name Osaku IKUTA, which derived from the name of the ward (Ikuta Ward) in Kawasaki City, where he was living.
「助太刀屋助六」の原作等として生田大作(いくたおおさく)のペンネームをもつが、これは川崎市内の岡本の住所に由来している。