sentences:  Kōshū Tani
  
  He is known mostly for his hard science fiction works, for which he won the Seiun Award three times (twice for Best Novel, and once for Best Short Story), and the Nitta Jirō Culture Award once.He is a member of the Mystery Writers of Japan, the Science Fiction and Fantasy Writers of Japan, the Space Authors Club, and an associate member of the Hard SF Laboratory.