ゲートキーパーズ21 online kijken met Nederlandse ondertiteling. ゲートキーパーズ21 is een Animatie televisie serie met in totaal 1 seizoenen en 6 afleveringen om te streamen en downloaden.
| Directing | Hiroshi Yamaguchi | Director |
| Production | 渡辺隆 | Producer |
| Sound | 田中公平 | Music |
| Writing | 山口宏 | Original Story |
| Visual Effects | 後藤圭二 | Character Designer |
| Art | 菊地正典 | Art Direction |
| Sound | 鶴岡陽太 | Sound Director |
| Camera | Takashi Horiuchi | Director of Photography |
| Visual Effects | Eriko Murata | Color Designer |
| Sound | 野川さくら | Theme Song Performance |
| Sound | Junko Watanabe | Theme Song Performance |
| Visual Effects | Tomohiro Kawahara | Mechanical Designer |
| Visual Effects | Toshiaki Ihara | Mechanical Designer |
| Production | Futagi Daisuke | Producer |
| Production | Masafumi Fukui | Producer |
| Production | Shouji Murahama | Producer |
