Kosuke Fujishima made his debut in 1986 with MAKING BE FREE!, published in issue 8 of Weekly Morning (Kodansha). That same year, he began the serialization of You're Under Arrest in Morning Party Zōkan (Kodansha). In 1988, he launched Oh My Goddess! in Monthly Afternoon (Kodansha).

He is also well known for his character design work in video games, including the Sakura Wars and Tales of series.