Hiroya Oku's most popular book is Gantz/1 with 42 saves and an average rating of 3.41⭐.
Series
31 primary books26 released booksAuthored 100% of series
Gantz is a 26-book series with 26 released primary works first released in 2000 with contributions by Hiroya Oku.
Series
10 primary booksAuthored 100% of series
Gigant is a 10-book series with 10 released primary works first released in 2018 with contributions by Hiroya Oku and 奥浩哉.
Series
10 primary booksAuthored 100% of series
犬屋敷 [Inuyashiki] is a 10-book series with 10 released primary works first released in 2014 with contributions by Hiroya Oku.
Series
0 released booksAuthored 0% of series
Gantz Novels is a 0-book series first released in 2010 .