Appears on releases
| # | Title | Length | Track artist | Release title | Release artist | Release group type | Country/Date | Label | Catalog# |
|---|---|---|---|---|---|---|---|---|---|
| Official | |||||||||
| 9.29 | 秘密の通り道 | 1:18 | 中河健 | ガスト20周年記念CDボックス (数量限定生産) | Various Artists | Album + Compilation + Soundtrack |
| KOEI (video game music) | KECH-8005 |
| Pseudo-Release | |||||||||
| 9.29 | Secret Passage | 1:18 | 中河健 | GUST 20th ANNIVERSARY CD BOX | Various Artists | Album + Compilation + Soundtrack | |||
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