Gaku Kuze is a Japanese manga artist and the original creator of the manga series Life Lessons with Uramichi-Oniisan. Kuze was born on January 17, though the year of birth has not been publicly disclosed.

Kuze is the author and illustrator of Life Lessons with Uramichi-Oniisan, which began serialization online in Ichijinsha's Comic POOL digital manga magazine on May 12, 2017. The series is published in collected tankōbon volumes by Ichijinsha, with the first volume released on September 27, 2017, and the series remains ongoing with multiple volumes released in subsequent years. An English-language version of the manga has been licensed and published in North America by Kodansha USA.

The series received an anime television adaptation that aired from July 6 to September 28, 2021, on TV Tokyo and other networks in Japan. The anime was produced by Studio Blanc, directed by Nobuyoshi Nagayama, with series composition by Touko Machida. Kuze is credited as the original story creator and also for the original character designs for the anime adaptation. The series was licensed for international distribution by Funimation and subsequently made available on Crunchyroll.

The work for which Kuze is best known, Life Lessons with Uramichi-Oniisan, is a dark comedy that follows a group of adult performers on a children's television program who struggle with the mundanity and exhaustion of adulthood while maintaining cheerful on-screen personas. The series is noted for its cynical and satirical tone, contrasting the bright, colorful setting of a children's show with the jaded, existential outlook of its adult characters. This approach has established Kuze's artistic identity around a blend of comedy and social commentary on the pressures of modern adult life in Japan.