Weekly Shonen Jump issue 9, 1972 — 週刊少年ジャンプ, the weekly manga anthology published by Shueisha — came out on February 21, 1972 and carries 12 series, with Hop Step on the cover. Inside: Hop Step, Koya no Shonen Isamu, The Gutsy Frog (Dokonjou Gaeru), Musashi, Harenchi Gakuen and Toilet Hakase (Professor Toilet), and more. This issue carries the first chapter of Hop Step.