Sakurazaka made his debut in 2002 at the second Super Dash Novel Rookie of the Year Award with the novel MAHO TSUKAI NO NETTO, which was later published in December 2003 under the name YOKU WAKARU GENDAI MAHO. This work has subsequently been expanded into a series of light novels and has also been made into an anime. In 2004 he was presented the S-F Magazine Readers Award's best short story award for Saitama Chainsaw Shōjo (さいたまチェーンソー少女?). His 2004 novel ALL YOU NEED IS KILL, received high praise from other authors in Japan and has subsequently been published in English by Viz Media.
When the alien Mimics invade, Keiji Kiriya is just one of many recruits shoved into a suit of battle armor called a Jacket and sent out to kill. Keiji dies on the battlefield, only to be reborn each morning to fight and die again and again. On his 158th iteration, he gets a message from a mysterious ally --- the female soldier known as the Full Metal Bitch. Is she the key to Keiji's escape or his final death?