Risa Itou, also romanized as Risa Itō, is a Japanese manga artist born on September 6, 1969, in Hara, Suwa District, Nagano Prefecture. She is the eldest of three sisters and pursued her artistic education by studying Formative Fine Arts at Joshibi University of Art and Design Junior College after graduating from Suwa Futaba High School. Itou made her professional debut as a manga creator in 1987 with the short story Papa no Holiday, published in Monthly Asuka magazine. Her career has since been defined by a talent for gag comedy and the creation of memorable, often bizarre, animal characters that have successfully transitioned from the page to the screen.

Itou is best known for two manga series that have been adapted into notable anime television productions. The first is Oruchuban Ebichu, a comedy manga about a talking housekeeping hamster. This series was adapted into an anime by the renowned studio Gainax. Her later work, Higepiyo, is a four-panel gag manga serialized in Shueisha's josei magazine Chorus from 2004 to 2006, later compiled into a single volume. The story follows a small, bearded yellow bird named Higepiyo who is adopted as a pet by a young boy named Hiroshi. The manga was adapted into a 39-episode anime television series that premiered on the Japanese broadcaster NHK in April 2009. Directed by Atsushi Takeyama and produced by the studio Kinema Citrus, the show is known for its short, ten-minute episodes and its surreal, family-friendly humor, which contrasts with some of her other work.

The artistic identity of Risa Itou is strongly rooted in the comedy and gag manga genres. She possesses a unique ability to create absurd and unsettling yet endearing characters, such as the talking hamster Ebichu and the mustachioed chick Higepiyo. Her storytelling often involves placing these anthropomorphic creatures into mundane, everyday situations, generating humor from the resulting contrast. While a series like Higepiyo is suitable for children, her broader body of work demonstrates a wide range, with Oruchuban Ebichu being known for its more adult-oriented, sexually explicit, and sometimes violent humor. This versatility highlights her skill in crafting comedy for different audiences while maintaining her distinct artistic voice.

Risa Itou holds significant industry standing, having received two of Japan's most prestigious awards for manga. In 2005, she won the Kodansha Manga Award in the shōjo category for her series Oi Pītan. The following year, in 2006, she was awarded the Tezuka Osamu Cultural Prize in the Short Story category for a collective body of work that included One Woman, Two Cats, Oi Piitan, and Onna no Mado. These accolades, along with the successful anime adaptations of her work by major studios like Gainax and Kinema Citrus, cement her legacy as an influential and respected creator in the world of comedic manga.