Hiroya Oku(奥 浩哉Oku Hiroya, born September 16, 1967 in Fukuoka, Fukuoka) is a mangaka who is the creator of Gantz, Zero-One and HEN, all of which have been serialized in Young Jump. He is currently working on Phase 3 of Gantz, due to be released in October 2009. His manga often contain explicit violence and gore, as well as sexual situations. He won the second prize of the Youth Manga Awards in 1988, under the penname Yahiro Kuon. He designed a character for Namco Bandai's Xbox 360 and PlayStation 3 fighting game, Soulcalibur IV named Shura.