Appears on releases
| # | Title | Length | Track artist | Release title | Country/Date | ||||
|---|---|---|---|---|---|---|---|---|---|
| Official | |||||||||
| 1.1 | SO BLUE | 4:38 | 森高千里 | SO BLUE |
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| 1.6 | SO BLUE | 4:37 | 森高千里 | TAIYO |
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| 1.6 | So Blue | 4:37 | 森高千里 | TAIYO |
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| 3.3 | SO BLUE | 4:36 | 森高千里 | ザ・シングルス |
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| 3.3 | SO BLUE | 4:36 | 森高千里 | ザ・シングルス (初回出荷限定盤) |
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| 1.7 | SO BLUE | 4:39 | 森高千里 | UHQCD THE FIRST BEST SELECTION '93～'99 |
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| Pseudo-Release | |||||||||
| 1.6 | So Blue | 4:37 | 森高千里 | Taiyo |
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