The name Jirō Chōnan remains absent from all documented materials regarding "The Littlest Warrior" (also known as "Anju to Zushiōmaru"). This narrative centers exclusively on Zushio and his sister Anju, who endure kidnapping and enslavement under a cruel master. Their struggle focuses on survival and reuniting with their mother, with no inclusion of a character named Jirō Chōnan.

Analyses of the series identify 19 distinct characters, none corresponding to Jirō Chōnan. Wider examinations of other media—such as "The Wind Rises" (featuring Jiro Horikoshi), TYPE-MOON franchises (referencing unrelated characters Taro and Jiro), or "The Walking Dead" (including a minor character named Jiro)—similarly reveal no association with "The Littlest Warrior."

Official media, including spin-offs, OVAs, and supplementary materials, contain no mention of this character.