IKU is a Japanese pop singer signed to Geneon Entertainment. She made her major debut in 2008 with the single "Oto no nai Yozora ni / Ko no Me Kaze", produced by I've Sound producer Takase Kazuya. She appeared with I've Sound in the I've in Budokan 2009 concert on January 2, 2009.
- [2011.05.25] ROBE
- [2008.03.19] Oto no nai Yozora ni / Ko no Me Kaze (音のない夜空に / 木の芽風)
- [2008.11.26] Rimless ~Fuchinashi no Sekai~ (Rimless ～フチナシノセカイ～)
- [2009.02.25] Chikaigoto ~Sukoshi Dake Mou Ichido~ (誓い言 ～スコシだけもう一度～)
- [2016.04.02] Kimi no Namae (君の名前)
Compilations / Other Songs
- [2013.08.28] To Aru Majustu no TV Songs (とある魔術の楽曲目録; A Certain Magical TV Songs) (#? Rimless ~Fuchinashi no Sekai~ ; #? Chikaigoto ~Sukoshi Dake Mou Ichido~ ; #? Pray ~Inori~)