Weekly Shonen Jump issue 20, 1971 — 週刊少年ジャンプ, the weekly manga anthology published by Shueisha — came out on May 10, 1971 and carries 13 series, with Otoko Ippiki Gaki Daishou on the cover. Inside: Otoko Ippiki Gaki Daishou, Japasshu, Toilet Hakase (Professor Toilet), The Gutsy Frog (Dokonjou Gaeru), Manga Drifters and Worst, and more. This issue carries the first chapter of Japasshu. It contains the final chapter of Bijomaru.