| english title | Gatekeepers 21 |
| original title | Gatekeepers 21 |
| year | 2002 |
| country | Japan |
| director | GOTOH Keiji | |
| producer | YAMAGUCHI Hiroshi | |
| composer | TANAKA Kohei | |
| planning | YASUDA Takeshi - 安田猛 |
| duration | 6 OAV |
| production studio | Gonzo |
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