Hiroshi Sakurazaka was born in 1970. After a career in information technology, he published his first novel Wizards' Web in 2003. His 2004 short story Saitama Chainsaw Massacre won the 16th SF Magazine Reader's Award. His other novels include Characters (co-written with Hiroki Azuma) and All You Need is KILL, which was published by Haikasoru in 2009.