After dropping out of Aichi Prefectural University of Fine Arts and Music, he made his professional debut when "Kotetsu no Queen" was published in Weekly Shonen Jump Extra in 1975. In the same year, he received the Tezuka Award as the best young comic creator for his Harukanaru Asa and quickly established himself as the most promising mangaka in 'hard' science-fiction manga.
His specialty is SF, but he is also interested in history; his most recent stories are concerned with ancient history and folklore.
His major works include 2001 Ya Monogatari, Yamataika, and Munakata Kyouju Denkikou.
UOTO Osamu was his assistant.
AKIMOTO Osamu is a fan of his.
His great uncle is the famous author, critic and poet ITOU Sei (伊藤整).