Appears on releases
| # | Title | Length | Track artist | Release title | Release artist | Release group type | Country/Date | Label | Catalog# |
|---|---|---|---|---|---|---|---|---|---|
| Official | |||||||||
| 1.18 | レッドゾーン | 2:09 | 岩崎琢 | Nikukyu ～BLACK CAT Original Soundtrack～ | 岩崎琢 | Album + Soundtrack |
| RESERVOIR RECORDS (Japanese label) | TOCT-25989 |
| Bootleg | |||||||||
| 1.18 | レッドゾーン | 2:12 | 岩崎琢 | BLACK CAT Original Soundtrack - Nikukyu | 岩崎琢 | Album + Soundtrack |
| MIYA RECORDS (Taiwanese bootleg label) | MICA-0696 |
| Pseudo-Release | |||||||||
| 1.18 | Red Zone | ?:?? | Taku Iwasaki | BLACK CAT Original Soundtrack - Nikukyu | Taku Iwasaki | Album + Soundtrack | |||
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