Akutagawa Prize

The Akutagawa Prize (芥川龍之介賞, Akutagawa Ryūnosuke Shō) is a Japanese literary award presented semi-annually. Because of its prestige and the considerable attention the winner receives from the media, it is, along with the Naoki Prize, one of Japan's most sought after literary prizes.

From the Wikipedia article “Akutagawa Prize”, licensed under CC BY-SA 4.0.

Check the official rules of the Akutagawa Prize 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.