Your favourite teddy bear. That model kit that took so long to complete. The picture book you used to read over and over again. The shining stone you found that day in the park. Where do all your childhood's treasures go when you grow up? In this story, we meet fantastic creatures that gather all these little objects that fall into oblivion as they are forgotten by their owners when they step into adulthood. These creatures sneak into our world from a different dimension, and unseen by humans, they take all the ditched and forgotten "treasures" into their world. Here, they use their booty to build their own city, a fairy tale-like place called... Oblivion Island!
| Directing | Shinsuke Sato | Director |
| Visual Effects | Hirofumi Uchihori | CGI Director |
| Visual Effects | Ryo Hirata | Character Designer |
| Sound | Tadashi Ueda | Music |
| Visual Effects | Hitoshi Uehara | CGI Director |
| Production | Katsuji Morishita | Producer |
| Visual Effects | Takashi Nagasaki | CGI Director |
| Production | Mitsuhisa Ishikawa | Executive Producer |
| Art | Masanobu Nomura | Art Direction |
| Visual Effects | Daiki Nakazawa | CGI Director |
| Production | Daisuke Sekiguchi | Producer |
| Sound | Takashi Ui | Sound Director |
| Art | Michie Suzuki | Assistant Art Director |
| Visual Effects | Ren Ishimori | Character Designer |
| Production | Chihiro Kameyama | Executive Producer |
| Visual Effects | Nobumasa Hoshino | CGI Director |
| Editing | Tsuyoshi Imai | Editor |
| Writing | Otsuichi | Screenplay |
| Crew | Masaki Taie | CGI Supervisor |
| Directing | Naoyoshi Shiotani | Second Unit Director |
| Production | Naoto Inaba | Assistant Production Coordinator |
| Visual Effects | Atsushi Takeuchi | Mechanical Designer |
| Writing | Shinsuke Sato | Screenplay |
| Art | Akihiro Hirasawa | Background Designer |
| Art | Ren Ishimori | Prop Designer |
| Art | Ryouka Kinoshita | Assistant Art Director |
| Visual Effects | Jun Satake | Effects Supervisor |
| Crew | Nobuhiro Morita | CG Supervisor |
| Visual Effects | Kazuhiro Nishikawa | CGI Director |
| Editing | Kazumi Wakimoto | Editor |
| Editing | Hitomi Kato | Editor |
| Art | Dwight Hwang | Storyboard Artist |
| Art | Naoyoshi Shiotani | Storyboard Artist |
| Sound | Christopher Moriana | Sound |
| Sound | Catherine Harper | Sound |
| Sound | James Moriana | Sound |
| Sound | Jeffrey Wilhoit | Sound |
| Sound | Nerses Gezalyan | Sound |
| Sound | Brett Voss | Sound |
