Shinichi Hoshi (星 新一 Hoshi Shin'ichi, September 6, 1926 – December 30, 1997) was a Japanese novelist and science fiction writer. He is best known for his "short-short" science fiction stories, often no more than three or four pages in length, of which he wrote over 1000. He also wrote mysteries, and won the Mystery Writers of Japan Award for Mōsō Ginkō (Delusion Bank) in 1968.
His friend Osamu Tezuka used his name for a character in Amazing 3, a cartoon series which Tezuka produced in 1967.
His short-short was translated into English and published in Magazine of Fantasy and Science Fiction, June 1963.
His books translated into English include There Was a Knock, a collection of 15 stories, and The Spiteful Planet and Other Stories.
His grandmother on his mother's side, Kimiko Koganei, was the sister of Mori Ōgai.