Japanese manga artist Seo Kouji hails from Shobara in Hiroshima, Japan. He has stated that he was a member of his high school's track and field team and enjoys watching baseball, both of which are emphasized in his popular manga series Suzuka. Seo made his debut as an artist with the one-shot "Half & Half" in Fresh magazine in 1996. His other notable works include Suzuka and Cross Over, which combined sports genres with high school romance, specifically track and field and basketball respectively. It's worth noting that many of Seo's male protagonists share a similar physical appearance to one another, as seen in Half & Half, Cross Over, Suzuka, and Kimi No Iru Machi.
Seo was an assistant to Oushima Tsukasa and studied under Fujio Fujiko and Soda Masahito. In 2009, Seo designed the High School Girl Kimchi for Hokubi Construction's food company.