Manga Taishō

The Manga Taishō (マンガ大賞; transl. Cartoon Grand Prize) is a Japanese comics award recognizing achievement in manga. It is awarded annually to a manga series published in the previous calendar year of eight or fewer collected volumes in length. The Manga Taishō was founded with the aim of recognizing new and relatively unestablished manga, and to provide a platform to promote these works to new readers. To this end, the prize utilizes a judging criteria of recognizing manga one would "want to recommend to friends", rather than a strictly meritocratic evaluation of artistic excellence. The prize is presented by the Manga Taishō Executive Committee, a volunteer group of roughly one hundred "manga lovers from all walks of life", primarily bookstore workers who manage in-store manga sections.

From the Wikipedia article “Manga Taishō”, licensed under CC BY-SA 4.0.

Check the official rules of the Manga Taishō for the current eligibility window, accepted formats, residency or language requirements and any entry fee. For most established prizes the publisher submits on the author's behalf, often with a limit on entries per imprint.

If you are self-published, look for an explicit statement that independently published books are accepted, and budget for entry fees and copies for judges.