 On the cover of the first issue of "Shōnen Sekai" it pictured both Crown Prince Munehito, and the other Empress Jingū who was conquering Sankan (three ancient kingdoms of Korea).Inside of the issue were stories about these matters and Toyotomi Hideyoshi's raid on Korea in 1590.The pioneer of modern Japanese children's media Sazanami Iwaya wrote the first modern children's story "Koganemaru" in 1891 and also started "Shōnen Sekai" in 1895.