Weekly Shonen Jump issue 16, 1971 — 週刊少年ジャンプ, the weekly manga anthology published by Shueisha — came out on April 12, 1971 and carries 12 series, with Key Girl on the cover. Inside: Key Girl, The Gutsy Frog (Dokonjou Gaeru), Arashi! San-piki, Toilet Hakase (Professor Toilet), Genyaku Seisho and The Human Condition, and more. This issue carries the first chapter of Key Girl. It contains the final chapter of Ikari no Mound.