Shogakukan founded Shueisha, which also founded Hakusensha. These are three separate companies, but are together called the Hitotsubashi Group, one of the largest publishing groups in Japan. Shogakukan is headquartered in the Shogakukan Building in Hitotsubashi, Chiyoda, Tokyo, and the other two companies are located in the same ward.
In Europe, manga from Shōgakukan and Shūeisha are published by local publishers such like Pika Édition, Ki-oon, Kana or Kazé for the French market, and Kazé, Carlsen, Egmont or Tokyopop for the German market. Shogakukan, Shueisha and ShoPro have made a joint venture named Viz Media Europe. Viz Media Europe bought in 2009 the French Kazé Group whose activities are mainly publishing manga and home video for the French and German market.