Published in the November 1925 issue of Shōnen Club (少年倶楽部), Ninjutsu Hiden Monogatari (忍術秘傳物語, “Tales of Secret Ninjutsu Traditions”) is a six-page illustrated feature by Itoh Gingetsu introducing young readers to historical ninjutsu through a series of practical examples and illustrations. Rather than presenting ninja as supernatural figures, Gingetsu examines traditional concealment methods involving rats, toads, snakes, and cats, explaining them as techniques based on deception, psychology, timing, and the careful observation of animal behavior. The article concludes by arguing that ninjutsu was fundamentally a practical military discipline rooted in strategy and scientific reasoning rather than magic or theatrical fantasy. As one of the earliest known Japanese juvenile magazine features devoted entirely to ninjutsu, it provides an important window into how ninja traditions were interpreted and popularized during the Taisho period.