Gakkyuu Ou Yamazaki: Yamazaki Oukoku Daifunsou! | December 23, 1999

 Gakkyuu Ou Yamazaki: Yamazaki Oukoku Daifunsou! (1999, December 23, Sega) is a Dreamcast game. In this board game, characters, including Yamazaki, use dice rolls and mini-games to earn money and aim to become the Classroom King. Erica, who only appeared in the original manga, also makes an appearance.

Gakkyuu Ou Yamazaki a Japanese gag manga written by Manabu Kashimoto, serialized in Monthly CoroCoro Comic and Bessatsu CoroCoro Comic, and later adapted into a television anime.

Yamazaki, the heir to the Yamazaki family, transfers to Class 3-6 at Kanmimi Academy in Kanmimachi with the goal of becoming the "Classroom King." The story follows him as he gets involved in various incidents with his classmates, teachers, and the eccentric members of the Yamazaki family. The manga began serialization in the September 1995 issue.

The title initially proposed by the editor was "Ultimate Classroom Representative Yamazaki."

In the early stages of serialization, many of the gags revolved around Yamazaki's strange actions or situations that caused his classmate Takuya and others to get caught up in them. Later on, scatological humor became prevalent, and a pattern developed where Yamazaki would scheme to make money or get involved in other people's odd behaviors.

In 1997, a television anime started airing as part of the morning program Oha Sta, and by the end of that year through 1999, a 30-minute version of the anime was broadcast outside of Oha Sta. During the anime's run, there were also media mix adaptations, including games and merchandise, but after the anime ended, popularity waned. The manga ended its serialization in the February 2001 issue. After that, Kashimoto's works mainly focused on adventure mangas like Korokke! and Boku wa Galileo.

In 2017, new stories were published in the CoroCoro Aniki summer and autumn issues.