In the West he might be best known for manga-related works and the story The Sunset, 2217 A.D. which appeared in Frederik Pohl's "Best Science Fiction for 1972".
[1][2] In 1954, Mitsuse again entered the department of literature, philosophy course, in Tokyo University of Education, which he did not graduate from.
And next year, he obtained a stable job as a high school teacher of biology and earth science.
Thus he was allowed to marry with Chitose, and Mitsuse became Kimio Iizuka (飯塚 喜美雄).
[5][6] Before his marriage, Mitsuse joined "Kagaku Sōsaku Club" where Takumi Shibano was operating as a publisher and an editor of the coterie magazine "Uchū-jin" in 1957.
He started publishing various short novels in Uchū-jin (宇宙塵) under the pen-name Mitsuse Ryū.
His early long SF novel Tasogare ni Kaeru (黄昏に還る) belongs to this series.