Synopsis: Middle Manager Tonegawa

Chuukan Kanriroku Tonegawa is a spin-off of Kaiji and focuses on the Vice President of Teiai Corporation, Tonegawa, working under Kazutaka Hyoudou. Hyoudou commissions Tonegawa to create a "game of death" to alleviate his ennui, leading Tonegawa and his team to work tirelessly to complete the task. The show also features comedic interludes with characters from Kaiji. The volumes also contain bonus stories such as "1-nichi Gaishutsuroku Hanchou" in Volume 2 and "Tonegawa vs. Hanchou" in Volume 5.