Appears on releases
| # | Title | Length | Track artist | Release title | Release artist | Release group type | Country/Date | Label | Catalog# |
|---|---|---|---|---|---|---|---|---|---|
| Official | |||||||||
| 1.1 | 20粒のココロ | 5:36 | RYTHEM | 20粒のココロ | RYTHEM | Single |
| Sony Music Associated Records (imprint "A∫R") | AICL-1664 |
| 1.14 | 20粒のココロ | 5:36 | RYTHEM | 夢現ファクトリー | RYTHEM | Album |
| Sony Music Associated Records (imprint "A∫R") | AICL-1746 |
| 1.8 | 20粒のココロ | 5:36 | RYTHEM | BEST STORY (初回限定盤B) | RYTHEM | Album + Compilation |
| Sony Music Associated Records (imprint "A∫R") | AICL-2036, AICL-2037 |
| 1.8 | 20粒のココロ | 5:36 | RYTHEM | BEST STORY (初回限定盤A) | RYTHEM | Album + Compilation |
| Sony Music Associated Records (imprint "A∫R") | AICL-2034, AICL-2035 |
| 1.8 | 20粒のココロ | 5:36 | RYTHEM | BEST STORY (通常盤) | RYTHEM | Album + Compilation |
| Sony Music Associated Records (imprint "A∫R") | AICL-2038 |
| Pseudo-Release | |||||||||
| 1.8 | 20 Tsubu no Kokoro | 5:36 | RYTHEM | BEST STORY | RYTHEM | Album + Compilation |
| ||
| (unknown) | |||||||||
| 1.14 | 20 Tsubu no Kokoro | 5:36 | RYTHEM | Mugen Factory | RYTHEM | Album |
| ||
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