Hiroya Oku has written at least 108 books. Their most popular book is Gantz/1 with 28 saves with an average rating of 3.4⭐.
They are best known for writing in the genres Science fiction, Comics, and Adventure.
Adventurous, dark, and sad are their most common moods.
 Gantz/1
| 3.4 |
 Inuyashiki, Vol. 1
| 4 |
 Gantz Omnibus Volume 1
| 2.75 |
 Gantz/3 Gantz/3
| 2.8 |
 Gantz/2 Gantz/2
| 2.8 |
 Inuyashiki, Vol. 2
| 4.5 |
 Gantz/5 Gantz/5
| 2.5 |
Gantz/7 Gantz/7
| 2.75 |
 Gantz/6 Gantz/6
| 2.75 |
 Gantz/4 Gantz/4
| 2.33 |
Gantz/8 Gantz/8
| 2.5 |
 Gantz/22 Gantz/22
| 2.33 |
Gantz/14 Gantz/14
| 2 |
 Gantz/30
| 2.33 |
 Gantz/32
| 2 |
 Gantz/33
| 2.33 |
 Gantz/35
| 2 |
 Gantz/23 Gantz/23
| 2.33 |
 Gantz/13 Gantz/13
| 2.33 |
Gantz/12 Gantz/12
| 2.33 |
 Inuyashiki, Vol. 3
| 4 |
Gantz/24 Gantz/24
| 2.33 |
Gantz/25 Gantz/25
| 2.33 |
 Gantz /10
| 2.67 |
 Gantz/27
| 3 |
 Gantz/29
| 2.33 |
 Gantz/28
| 2.33 |
 Gantz/31
| 2.33 |
 Inuyashiki, Vol. 5
| 4.33 |
 Inuyashiki, Vol. 4
| 4.33 |
 Gantz /21
| 2 |
 Gantz /16
| 2 |
 GIGANT, Vol. 5
| 3.5 |
 Gantz /19
| 2 |
Gantz Omnibus Volume 7 Gantz Omnibus Volume 7
| 4 |
 Gigant, Vol. 8
| 3.5 |
 Gantz/26
| 2 |
 Gantz/37
| 2.33 |
 Gantz Volume 18 Gantz Volume 18
| 2 |
 Gantz/34
| 2 |
Gantz Omnibus Volume 6 Gantz Omnibus Volume 6
| 4.25 |
 Gantz/36
| 2 |
 Gantz /11
| 2 |
 Gantz /9
| 2 |
 Gantz /15
| 2 |
 Gantz /20
| 2 |
 Gantz /17
| 2 |
 Gantz Omnibus Volume 10
| 3 |
Gantz Omnibus Volume 5 Gantz Omnibus Volume 5
| 3.75 |
Gantz/9 Gantz/9
| 3 |
Gantz/10 Gantz/10
| 3 |
GIGANT 1 GIGANT 1
| 0 |
 GIGANT 10
| 2 |
 GIGANT
| 3 |
 GIGANT 7
| 4 |
 Gigant 6
| 3 |
 Gigant 4
| 3 |
 GIGANT #3
| 4 |
 Inuyashiki, Vol. 9
| 5 |
 Inuyashiki, Vol. 7
| 5 |
 Inuyashiki, Vol. 6
| 4.5 |
Gantz Omnibus Volume 12 Gantz Omnibus Volume 12
| 3 |
 GIGANT, Vol. 1
| 5 |
 Gantz Omnibus Volume 9
| 3 |
 Gantz Omnibus Volume 11
| 3 |
 Gantz Omnibus Volume 8
| 4 |
Gantz/15 Gantz/15
| 2 |
Gantz/20 Gantz/20
| 1 |
Gantz/16 Gantz/16
| 2 |
Gantz/17 Gantz/17
| 3 |
 Inuyashiki, Vol. 10
| 5 |
 Inuyashiki, Vol. 8
| 4 |
 Gigant, tomo 1
| 5 |
Gigant, tomo 2 Gigant, tomo 2
| 0 |
 Last Hero Inuyashiki, Vol. 1
| 0 |
 Gantz/18
| 2 |
Gantz/11 Gantz/11
| 3 |
Gantz/19 Gantz/19
| 2 |
 Gantz Omnibus Volume 2
| 4 |
Gantz, Volume 34 Gantz, Volume 34
| 1 |
Gantz/21 Gantz/21
| 2 |
 Gantz /1
| 4 |
 Last Hero Inuyashiki, Vol. 2
| 0 |
 Last Hero Inuyashiki, Vol. 3
| 0 |
 Last Hero Inuyashiki, Vol. 4
| 0 |
 Last Hero Inuyashiki, Vol. 5
| 0 |
 Last Hero Inuyashiki, Vol. 6
| 0 |
 Last Hero Inuyashiki, Vol. 7
| 0 |
 Last Hero Inuyashiki, Vol. 8
| 0 |
 Last Hero Inuyashiki, Vol. 9
| 0 |
 Last Hero Inuyashiki, Vol. 10
| 0 |
 GIGANT 2
| 4 |
 Inuyashiki 10
| 3 |
 Inuyashiki 8
| 4 |
 Inuyashiki 9
| 3 |
 Inuyashiki 7
| 4 |
 いぬやしき 6
| 4 |
Gigant T06 Gigant T06
| 0 |
 Inuyashiki
| 0 |
Gantz Omnibus Volume 4 Gantz Omnibus Volume 4
| 4 |