Atsuo Kuwasawa, born June 12, 1959, in Fukushima Prefecture, Japan, is a manga artist and original creator known for his work in the baseball genre. His primary claim to fame is the manga series Midoriyama Kōkō, which was serialized in Weekly Young Jump published by Shueisha. The series ran from 1984 to 1987, spanning 20 collected volumes. This manga later formed the basis for the anime adaptation Midoriyama Kōkō Kōshien-hen, an original video animation series released between 1989 and 1990.

For the OVA adaptation, Kuwasawa served in multiple creative capacities beyond being the original creator. He is credited with series composition and supervision, indicating a significant role in shaping the anime's narrative structure and ensuring its fidelity to the source material. The anime, directed by Masashi Ikeda and produced by the studio Animaruya, follows the story of the newly established baseball club at Midoriyama High School, focusing on the overpowering pitcher Nikaidō and his teammates as they compete in the national high school baseball tournament at Koshien Stadium.

Kuwasawa's artistic identity is closely tied to a blend of sports action and comedy. The original manga and its anime adaptation are noted for combining the intense, dramatic tropes of sports anime, reminiscent of classics like Star of the Giants, with absurdist humor and slapstick comedy. This fusion created a distinctive tone, where the protagonists' overwhelming strength and unconventional personalities lead to chaotic and often humorous outcomes on the baseball field. The series is characterized by its energetic and exaggerated portrayal of athletic competition, a style that contributed to its popularity.

Kuwasawa's industry significance lies in his contribution to the baseball manga genre during the 1980s. Midoriyama Kōkō represents a notable entry in the field, recognized for its unique tonal balance. The work has demonstrated lasting appeal, evidenced by the release of a DVD box set in 2006 and a Blu-ray Disc box in 2015, which included a new collaboration comic drawn by Kuwasawa himself. His creative output remains centered on this key property, which continues to be associated with his name as both the original author and a key creative force behind its animated adaptation.