was a Japanese writer.
Inagaki was born in Osaka, then moved to Akashi in Hyà Âgo Prefecture while he was in elementary school. He spent much of his childhood in Kà Âbe.
He graduated from Kwansei Gakuin Junior High School.
In 1923 Inagaki published One Thousand and One Second Stories (Issen ichibyà  monogatari), and by 1926 he was counted among members of the short-lived Shinkankakuha group of writers.
In 1929, Inagaki was also among the contributors to Ciné, the avant-garde poetry magazine founded by Chirà « Yamanaka, whose fellow contributors included Katué Kitasono and Shà «zà  Takiguchi.
In 1968 he won the first annual Japan Literature Grand Prize for , an essay on "aesthetic eroticism", where he divides stories into A (anal), V (vaginal), P (penile) and K (clitoral) varieties and "describe[s] the historical, psychological, and metaphysical ramifications of the love of beautiful boys in an eclectic blend of ideas culled from history, Freudianism, pop psychology, and existentialism."
Inagaki's works often dealt with themes including flight, astronomical objects, and erotic and romantic relationships among beautiful adolescent boys. His stories on the latter topic, and his essays in Shà Ânen'ai no Bigaku, were an influence on early writers of the yaoi genre such as Keiko Takemiya.