Ozaki Sekaikan (1984–) is a Japanese musician, novelist, and essayist. Best known as the vocalist, guitarist, and principal songwriter of the rock band Creephyp, he has also established himself as a distinctive literary voice. Drawing on the lyrical sensitivity of his songwriting, his fiction explores loneliness, love, family, and the subtle tensions of everyday life with psychological depth and sharp observation. He made his full-length fiction debut with "Yusuke" in 2016 and has since published a series of acclaimed novels and essays. His novel "Haha Kage" ("Mother's Shadow") was shortlisted for the 164th Akutagawa Prize, further cementing his reputation as one of the leading contemporary writers of his generation.