Jump SQ. Shucchōban 1 (ジャンプSQ. 出張版 ①Jump SQ. Shucchōban 1) is the 1st special chapter of Kazue Katō and Minoru Sasaki's Salaryman Exorcist: The Sorrows of Yukio Okumura out of three that were released prior to the beginning of the series' official serialization. This chapter is technically the first of the series overall to release in the Jump SQ. magazine (with Chapter 20 being the first chapter during the serialization).