Kōji Kumeta (久米田 康治 Kumeta Kōji, born on September 5, 1967 in Yokosuka, Kanagawa), is a Japanese gag manga artist. His most famous works are Go!! Southern Ice Hockey Club, Katte ni Kaizō and Sayonara Zetsubō Sensei. His other major works include √P Root Paradise, Sodatte Darling!! and The Sun's Soldier Poka Poka. The bulk of his work was published in Shōnen Sunday, until the abrupt cancellation of Katte ni Kaizō, which resulted in him transferring from Shogakukan to Kodansha. As of 2014, he has gone freelance. His latest serialization called Sekkachi Hakushaku to Jikan Dorobou, published in Weekly Shōnen Magazine was finished on January 7, 2015.
Sayonara Zetsubō Sensei was his first work to be made into an anime. Sayonara Zetsubō Sensei was awarded the 31st Kodansha Manga Award in the shōnen category.
- Go!! Southern Ice Hockey Club (行け!!南国アイスホッケー部 Yuke!! Nangoku Ice Hockey-bu)
- √P Root Paradise (√P ルートパラダイス)
- Sodatte Darling!! (育ってダーリン!!)
- The Sun's Soldier Poka Poka (太陽の戦士ポカポカ Taiyō no Senshi Poka Poka)
- Katte ni Kaizō (かってに改蔵)
- Sayonara, Zetsubou-Sensei (さよなら絶望先生)
- Joshiraku (じょしらく), story
- Sekkachi Hakushaku to Jikan Dorobou (せっかち伯爵と時間どろぼう)
- Studio Pulp (スタジオパルプ Sutajio Parupu)
- Kakushigoto (かくしごと)
- Nankuru Neesan (なんくる姉さん), story
- Kenjiro Hata
- Maeda-kun (also known as MAEDAX, MAEDAX G, MAEDAX Roman)