FASTENING DAYS 4 online kijken met Nederlandse ondertiteling. FASTENING DAYS 4 is een Animatie televisie serie met in totaal 1 seizoenen en 3 afleveringen om te streamen en downloaden.
| Directing | Shingo Yamashita | Series Director |
| Sound | Yoshinori Sunahara | Original Music Composer |
| Visual Effects | Saori Goda | Color Designer |
| Art | Hiromasa Ogura | Art Direction |
| Art | Taichi Shishido | Art Designer |
| Art | Yohei Kawamura | Art Designer |
| Visual Effects | Maring Song | Key Animation |
| Visual Effects | Chiwan | Key Animation |
| Visual Effects | Seigo Kujirai | Key Animation |
| Visual Effects | Manato Onishi | Key Animation |
| Visual Effects | Hyein | Key Animation |
| Visual Effects | Sugoroku | Key Animation |
| Visual Effects | Yu Min-zi | Key Animation |
| Visual Effects | Moaang | Animation Director |
| Visual Effects | Eri Irei | Animation Director |
| Visual Effects | Makoto Ogasawara | Character Designer |
| Writing | Junichi Tanaka | Writer |
| Visual Effects | Anri Ikumi | Key Animation |
| Visual Effects | Tetsuya Ishii | Key Animation |
| Visual Effects | Syoutarou Hamanaka | Key Animation |
| Visual Effects | Natsumi Hattori | Key Animation |
| Visual Effects | Kenta Taniguchi | Key Animation |
| Visual Effects | PEBBLE | Key Animation |
| Editing | Ryota Kinami | Editor |
| Sound | Toshiya Wada | Sound Effects |
| Visual Effects | h.s | Key Animation |
| Art | Shingo Yamashita | Storyboard Artist |