Japan

Shueisha Inc. (Japanese: 株式会社集英社, Hepburn: Kabushiki-gaisha Shūeisha) is a Japanese company headquartered in Chiyoda, Tokyo, Japan. The company was established in 1925 as the entertainment-related publishing division of Japanese publisher Shogakukan. The following year, Shueisha became a separate, independent company. Manga magazines published by Shueisha include the Jump magazine line, which includes shonen magazines Weekly Shōnen Jump, Jump SQ, and V Jump, and seinen magazines Weekly Young Jump, Grand Jump and Ultra Jump. They also publish other magazines, including Non-no. Shueisha, along with Shogakukan, owns Viz Media, which publishes manga from all three companies in North America

https://en.wikipedia.org/wiki/Shueisha