Kazumasa Hirai
    Kazumasa Hirai
    Birthday: May 13, 1938
    Family name: 平井
    Given name: 和正
    Died: January 17, 2015 (aged 76)

    Birth place: Yokosuka, Kanagawa Prefecture, Japan

    Kazumasa Hirai was a Japanese novelist. He graduated from Yokosuka Industrial High School and the law department of Chuo University. Hirai was well known for his science fiction manga work.