Appears on releases
| # | Title | Length | Track artist | Release title | Release artist | Release group type | Country/Date | Label | Catalog# |
|---|---|---|---|---|---|---|---|---|---|
| Official | |||||||||
| 1.3 | ココア | 4:27 | aiko | おやすみなさい | aiko | Single |
| PONY CANYON (one of the labels of 株式会社ポニーキャニオン (Japanese corporation) – see annotation for how to identify sibling labels) | PCCA-01526 |
| 4.12 | ココア | 4:27 | aiko | aikoの詩。 (初回限定盤) | aiko | Album + Compilation |
| PONY CANYON (one of the labels of 株式会社ポニーキャニオン (Japanese corporation) – see annotation for how to identify sibling labels) | PCCA-15020X |
| 4.12 | ココア | 4:27 | aiko | aikoの詩。 (通常盤) | aiko | Album + Compilation |
| PONY CANYON (one of the labels of 株式会社ポニーキャニオン (Japanese corporation) – see annotation for how to identify sibling labels) | PCCA-15020 |
| 4.12 | ココア | 4:26 | aiko | aikoの詩。 (24bit/96kHz) | aiko | Album + Compilation |
| PONY CANYON (one of the labels of 株式会社ポニーキャニオン (Japanese corporation) – see annotation for how to identify sibling labels) | PCCA-15020 |
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