Usami was born in Numazu, Shizuoka, and raised in Kanagawa Prefecture.She was awarded Bungei Prize for her first work Kaka (かか) in 2019. She was successively awarded Mishima Yukio Prize for the same work, which made her the youngest holder of the prize.She was also awarded the 164th Akutagawa Prize for her second work Oshi, Moyu (推し、燃ゆ).
that someone, not just a 20 year old but anyone, could write this is a bit startling. the concept of 推し、燃ゆ seems like easy and ripe material for a writer to tackle, whereas かか, Usami's first novel, is centered around the maelstromic relationship between a mother and daughter in which the mother, once revered by the daughter, descends into madness as the result of neglect by her parents and her children's father/ex-husband. the conceit is really sort of niche, but on top of that the relationship itself seems far too complex for the average writer to attempt. and sure enough, the novel ends up dipping into the psychospiritual, with Usami putting to paper some extremely intimate psychological images. the story is also both told in second-person, in the manner of a parent telling a tale to their child, and narrated in a specific idiolect (かか弁, which something like a pseudo-Kansai dialect mixed with childish speech patterns). the narration perfectly encapsulates the dynamics between the protagonist and her mother, giving weight to all the events.