Born in Hokkaido in 1962. Having worked as a clinical laboratory technician, Joji Hiyashi debuted as a writer in 1995 with his co-written Dai Nihon Teikoku Oushu Dengeki Sakusen. His popularity grew with the Shonetsu no Hatou series and the Heitai Gensui Oushu Senki series—both military fiction backed by real historical perspectives. Beginning in 2000, he consecutively released Kioku Osen, Shinryakusha no Heiwa and Ankoku Taiyo no Mezame, stories that combine scientific speculation and sociological investigations. He continues to write and act as a flag-bearer for a new generation of hard SF.