Born in Ehime Prefecture,[1] he is best known as the writer of the seinen manga series, Bungo Stray Dogs.
[4] After that, while preparing for job hunting related to screenplays, Asagiri decided to create something that people could watch for free.
He debuted as a novelist with the novelization Bungo Stray Dogs: Osamu Dazai's Entrance Examination, a prequel to the same work.
For Bungo Stray Dogs, Asagiri was inspired by Shūsaku Endō's story Ryūgaku as well as Osamu Dazai's last novel No Longer Human.
Kadokawa Shoten approached Asagiri with writing more content for the characters, which led to the production of light novels where the writer decided to explore Dazai's past.