Illustrations for Girl's Magazines
In 1928 Katsudi made his debut illustrating for the girls magazines Shōjo Gahō (少女画報, "Girls' Illustrated") and Shōjo Sekai (少女世界, "Girls' World") . He continued contributing to Shōjo Gahō until 1938, where he also developed his first mangas series about Poku-Chan, a Chinese girl and her adventures in daily life.
In 1935 he began working for Shōjo no Tomo (少女の友, "Girls' Friend"), a magazine with a positive, modern and stylish image. In 1940 he became the magazine's principal illustrator.