Tohru Fujisawa is a Japanese manga artist born in 1967 in Hokkaido. He originally wanted to work in animation but decided that manga would offer him more creative freedom, a choice that led to a prolific career beginning in the late 1980s. He moved to Tokyo at the age of seventeen to pursue his goal and started by writing science fiction doujinshi, or self-published works, to submit to publishers. His first serialized work, Adesugata Junjo Boy, was published in Kodansha's Weekly Shonen Magazine in 1989.

Fujisawa is best known as the creator of the Shonan series, a set of interconnected stories centered on the character Eikichi Onizuka. He first introduced Onizuka in the long-running manga Shonan Junai Gumi, also known as Shonan Pure Love Gang!, which was serialized from 1990 to 1996. This series follows Onizuka and his best friend Ryuji Danma as high school students and members of a notorious biker gang. A side story titled Bad Company, published in 1996, serves as a prequel showing the characters' first meeting. Fujisawa's most famous work is the direct sequel, Great Teacher Onizuka, or GTO, which ran from 1997 to 2002. This series shifts the setting to a classroom, following the now-adult Onizuka as he uses his unorthodox, often crude, but heartfelt methods to become a great teacher.

Several of Fujisawa's manga have been adapted into original video animations. The OAVs for Shonan Junai Gumi! were released in the 1990s, and Fujisawa is consistently credited as the original creator for these productions. His other works adapted into anime include Tokko, a darker action series, and the long-running GTO television anime. Beyond these, his extensive bibliography includes series such as Rose Hip Rose, Kamen Teacher, and numerous others across various magazines and publishers including Kodansha, Shueisha, and Shogakukan. He has also worked as a writer, providing the script for the manga Wild Base Ballers, which was illustrated by Taroh Sekiguchi.

Fujisawa's work is defined by recurring themes of youth rebellion, camaraderie, and a critique of social structures, particularly the Japanese school system. His stories often feature protagonists who are part of the biker or bancho subcultures, yet his work is known for blending violent, dramatic conflicts with broad slapstick comedy and a surprising degree of emotional sincerity. This approach is most famously realized in Great Teacher Onizuka, a character who embodies the rough-edged but fundamentally loyal and caring antihero. Fujisawa often draws from his own interests and background; he based the seaside setting of Shonan Junai Gumi on a location he admired after growing up inland, and he has cited inspirations ranging from the anime Akira to classic tokusatsu and sentai series, which are referenced in works like Himitsu Sentai Momoider.

Tohru Fujisawa holds significant standing in the manga industry. Great Teacher Onizuka won the prestigious Kodansha Manga Award in 1998. The series became an international bestseller, with millions of copies in circulation and adaptations into a successful live-action television drama in Japan. Through the character of Eikichi Onizuka, Fujisawa created a cultural icon that has resonated with audiences for decades, cementing his reputation as a major figure in shonen and seinen manga. He has continued to create new series, including several sequels and spin-offs set in the GTO universe, such as GTO: 14 Days in Shonan and GTO: Paradise Lost, demonstrating the lasting legacy of his most famous creation.