Niji no Oto
- Aoi Eir
- Niji no Oto (虹の音; Sound Of Rainbow)
- 2013.12.18 (Digital)
- Catalog Number
- ¥250 (Digital)
- CD Tracklist
- Niji no Oto (虹の音)
- Yume Sekai (ユメセカイ; Dream World)
- INNOCENCE (Live at Shibuya Public Hall) (INNOCENCE（Live at 渋谷公会堂）)
- Niji no Oto (TV size ver.) (虹の音(TV size ver.))
- Niji no Oto (Instrumental) (虹の音(Instrumental))
- DVD Tracklist
- Aoi Eir "Special Live 2013 -Starlight Reunion-" 2013.10.28 at Shibuya Koukaidou (藍井エイル Special Live 2013 -Starlight Reunion 2013.10.28 at 渋谷公会堂）)
"Niji no Oto" is the eighth single recorded by Aoi Eir, and her sixth major label single. It was released first just as a digital track, followed by a digital release of the single, and one limited CD+DVD physical format. The song was used as theme song for the anime special Sword Art Online Extra Edition. The B-side, "Yume Sekai" is a cover of the the song of same tittle by Tomatsu Haruka, which was originally used as first ending theme for the anime Sword Art Online.
There are currently three versions of "Niji no Oto" to be found in Aoi Eir's discography.
- Niji no Oto
- Found on the "Niji no Oto" single as track #1. This is the standard version of the song, which is set to the music video. It was later placed on Eir's sophomore studio album AUBE as track #11.
- Niji no Oto (TV Size)
- Found the "Niji no Oto" as track #4. This is the TV size version.
- Niji no Oto (Instrumental)
- Found the "Niji no Oto" single as track #5. This is the instrumental version.
Oricon Chart Positions
Total Reported Sales: 13,099
- Official Website Info
- Sony Music Shop
- Oricon Profile