Appears on releases
| # | Title | Length | Track artist | Release title | Release artist | Release group type | Country/Date | Label | Catalog# |
|---|---|---|---|---|---|---|---|---|---|
| Official | |||||||||
| 1.7 | 何故 | 5:46 | 長渕剛 | 家族 | 長渕剛 | Album |
| EXPRESS | TOCT-9333 |
| 2.7 | 何故 | 5:45 | 長渕剛 | BEST〜空〜 | 長渕剛 | Album + Compilation |
| FLME (imprint of FOR LIFE MUSIC ENTERTAINMENT, INC.) | FLCF-4001 |
| 1.7 | 何故 | 5:44 | 長渕剛 | 家族 (24bit リマスタリングシリーズ) | 長渕剛 | Album |
| EXPRESS | TOCT-25958 |
| Pseudo-Release | |||||||||
| 1.7 | Naze | 5:46 | Tsuyoshi Nagabuchi | Kazoku | Tsuyoshi Nagabuchi | Album | |||
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