The music of Eureka Seven is available on three different compilations composed by Naoki Sato and a variety of other artists who composed insert songs used in the series. The third soundtrack, Complete Best, includes the full-length versions of the opening and ending themes for both the series and game, as well as the insert song for the final episode.
Theme songs
- Opening themes
- "Days", by Flow (episodes 1–13)
- "A Young Boy's Heart" (少年ハート, Shōnen Hāto?), by Home Made Kazoku (episodes 14–26)
- "To the Center of the Sun" (太陽の真ん中へ, Taiyō no Mannaka e?), by Bivattchee (episodes 27–32, 34–39)
- "Sakura", by Nirgilis (episodes 40–49)
- Ending themes
- "Secret Base" (秘密基地, Himitsu Kichi?), by Kozue Takada (episodes 1–13, 26)
- "Fly Away", by Asami Izawa (episodes 14–25)
- "Tip Taps Tip", by Halcali (episodes 27–39)
- "Canvas", by Coolon (episodes 40–49)
- Insert songs
- Video game theme
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Eureka Seven: Complete Best
- Days
- Himitsu Kichi
- Shonen Heart
- Fly Away
- Taiyo No Mannaka E
- Tip Taps Tip
- Sakura
- Canvas
- Realize
- Niji
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