少年マイティ付録 [Shonen Maiti Furoku / Boy Mighty Supplement]

A single-issue supplement published by Shōnen Gahōsha in 1959, Boy Mighty Supplement is a standalone comic tied to the larger Shonen Maiti magazine line. Most associated with artist Ichirō Yoshinaka, this brief release captures a moment in late-1950s Japanese boys' manga, offering a compact, self-contained story from the early post-war period. Its significance lies in its rarity as a one-shot period piece, reflecting the format and style of the era's adventure comics.