Chocolate Underground follows two English boys who create a bootleg chocolate factory after their country bans chocolate consumption.
| Directing | Takayuki Hamana | Director |
| Art | Jun Takahashi | Storyboard Artist |
| Art | Takayuki Hamana | Storyboard Artist |
| Directing | Daisuke Takashima | Second Unit Director |
| Directing | Jun Takahashi | Second Unit Director |
| Directing | Takashi Ando | Second Unit Director |
| Directing | Akihiro Saito | Second Unit Director |
| Visual Effects | Hideaki Matsuoka | Animation Director |
| Visual Effects | Masato Numazu | Animation Director |
| Visual Effects | Hiroshi Oikawa | Animation Director |
| Visual Effects | Mamiko Nakanishi | Key Animation |
| Writing | Kiyoko Yoshimura | Screenplay |
| Visual Effects | Takayuki Goto | Character Designer |
| Visual Effects | Takayuki Goto | Supervising Animation Director |
| Art | Seiko Akashi | Art Direction |
| Visual Effects | Yasushi Tanizawa | Key Animation |
| Visual Effects | Yuko Fujii | Key Animation |
| Visual Effects | Tomoyuki Kinoshita | Key Animation |
| Visual Effects | Michiyo Hirabayashi | Key Animation |
| Visual Effects | Yoko Nomura | Key Animation |
| Visual Effects | Haruyo Sakai | Key Animation |
| Visual Effects | Tomomi Murayama | Key Animation |
| Visual Effects | Takashi Hirabayashi | Key Animation |
| Visual Effects | Tomofumi Koizumi | Key Animation |
| Visual Effects | Akiko Seki | Key Animation |
| Visual Effects | Ryutaro Sakaguchi | Key Animation |
| Visual Effects | Erina Kojima | Key Animation |
| Visual Effects | Yasunori Yamaguchi | Key Animation |
| Visual Effects | Hitomi Matsuura | Key Animation |
| Visual Effects | Ichiro Hattori | Key Animation |
| Visual Effects | Tomohiro Kamitani | Key Animation |
| Visual Effects | Ayako Karatani | Key Animation |
| Visual Effects | Akiko Taniguchi | Key Animation |
| Visual Effects | Yuichiro Masuda | Key Animation |
| Visual Effects | Kaori Saito | Key Animation |
| Visual Effects | Miho Aoki | Key Animation |
| Visual Effects | Mariko Aoki | Key Animation |
| Visual Effects | Naoko Ozawa | Key Animation |
| Visual Effects | Yukiyo Komito | Key Animation |
| Visual Effects | Taeko Oda | Key Animation |
| Visual Effects | Yoshinori Wakana | Key Animation |
| Visual Effects | Yuki Sato | Key Animation |
| Visual Effects | Masaki Miyauchi | Key Animation |
| Visual Effects | Risako Yoshida | Key Animation |
| Visual Effects | Kim Kyung-eun | Key Animation |
| Visual Effects | Yasunori Miyazawa | Key Animation |
| Visual Effects | Hiroyoshi Iida | Key Animation |
| Visual Effects | Akira Takahashi | Key Animation |
| Visual Effects | Michiaki Sugimoto | Key Animation |
| Visual Effects | Takashi Narikawa | Key Animation |
| Visual Effects | Mamoru Tamiya | Key Animation |
| Visual Effects | Eriko Ito | Key Animation |
| Visual Effects | Yuki Tanabe | Key Animation |
| Visual Effects | Miyuki Arai | Key Animation |
| Visual Effects | Daisuke Sakou | Key Animation |
| Visual Effects | Mayu Hoshino | Key Animation |
| Visual Effects | Masami Yamauchi | Key Animation |
| Visual Effects | Yukinori Yamada | Key Animation |
| Visual Effects | Narumi Takahashi | Key Animation |
| Visual Effects | Kim Yong-jae | Key Animation |
| Visual Effects | Masato Numazu | Key Animation |
| Visual Effects | Akira Tabata | Key Animation |
| Visual Effects | Jouji Sawada | Key Animation |