Kōji Kumeta is a Japanese manga artist born on September 5, 1967, in Yokohama, Kanagawa Prefecture. He moved to Yokosuka at the age of five, where he developed an early interest in drawing. His first encounter with manga was through Doraemon, though he did not draw manga again seriously until he entered Wako University, where he was a member of the manga club alongside notable contemporaries Taiyō Matsumoto and Hitoshi Iwaaki. After graduating with a degree in art education, he briefly worked as an assistant to Takuya Mitsuda for two days, an experience that convinced him to pursue his own path as a creator.

Kumeta made his professional debut in 1991 with Go!! Southern Ice Hockey Club, which was serialized in Weekly Shōnen Sunday until 1996. This early work established a pattern for his career, blending genres with a penchant for risqué humor. He continued publishing in Sunday throughout the 1990s and early 2000s with titles such as Katteni Kaizō, which ran from 1998 to 2004. Katteni Kaizō was notable for its surreal comedy and marked the beginning of Kumeta’s use of digital tools in manga production, a practice that was still uncommon at the time. The series ended abruptly, leading to his departure from Shogakukan.

Following this transition, Kumeta moved to Kodansha and began his most commercially successful work, Sayonara, Zetsubō Sensei, in Weekly Shōnen Magazine in 2005. The series, which concluded in 2012, follows a pessimistic teacher and his eccentric students, using black comedy and dense social satire. This was his first work to be adapted into an anime, with multiple television seasons and original video animations produced. In 2007, it won the 31st Kodansha Manga Award in the shōnen category. At the award ceremony’s after-party, Kumeta famously held a living funeral for himself, later explaining it as a way to ward off misfortune during an unusually successful period in his career.

His other notable works include Joshiraku, a manga about rakugo performers for which he provided the story while Yasu handled the art, serialized from 2009 to 2013. He later launched Kakushigoto in Monthly Shōnen Magazine, running from 2015 to 2020. This series, about a manga artist hiding his profession from his young daughter, received a television anime adaptation in 2020 and a theatrical film in 2021. After becoming a freelance artist in 2014, Kumeta returned to Weekly Shōnen Sunday in 2021 with his series Shibuya Near Family.

Kumeta’s artistic identity is defined by a distinctive evolution from a conventional shōnen style to a highly simplified, minimalist aesthetic characterized by clean lines, noodle-like figures, and an expressive use of negative space. His storytelling is marked by rapid-fire dialogue, surreal humor, and extensive use of lists, charts, and cultural references. Self-deprecation is a recurring element in his work, often manifesting through an author avatar depicted as a struggling, unkempt figure. He has also maintained a long-running, humorous public rivalry with fellow manga artist Ken Akamatsu. Kenjiro Hata, creator of Hayate the Combat Butler, was formerly his assistant, and the influence of Kumeta’s earlier style can be seen in Hata’s formative work.

His significance in the industry stems from his unique comedic voice and his impact on gag manga. Beyond his own serializations, he contributed original character designs for the anime adaptation of The Eccentric Family. Throughout his career, Kumeta has maintained a reputation for a cynical, introspective, and highly stylized approach to comedy that has garnered a dedicated following and influenced a generation of artists.