Yūko Ishibashi

is a Japanese singer, born April 3, 1980, in Tokyo, with a four octave vocal range. She is most well known for her vocal performances in Gust-produced video games such as the Ar tonelico series and '. She has also performed in various Japanese television advertisements and events, theater, and children's programmes. Her debut album Haruka naru Toki no Utagoe was released January 2008.

• 悠かなる刻の詩声 / Haruka naru Toki no Utagoe (Released January 23, 2008)

• ぴゅあぴゅあ / Pyua Pyua (January 27, 2005)

• North Wind Complete Tracks (January 28, 2005)

• 星詠～ホシヨミ～ Ar tonelico Hymmnos concert Side 蒼 / Singing for the Stars ~Hoshiyomi~ Ar tonelico concert side Blue （January 25, 2006）

• アルトネリコ OVA 封入特典CD / Ar tonelico OVA Enclosed Special CD (March 21, 2006)

• そしてこの宇宙にきらめく君の詩 VOCAL & SOUND TRACK～STARRY WORLD～ / Soshite kono Uchuu ni Kirameku Kimi no Uta VOCAL & SOUND TRACK~STARRY WORLD~(May 25, 2006)

• イリスのアトリエ グランファンタズム オリジナルサウンドトラック / Atelier Iris Grand Fantasm Original Soundtrack (June 21, 2006)

• クレア～そよかぜの約束～ -Ar tonelico hymmnos musical- / Claire~Soyokaze no Yakusoku (Promise of the Breeze)~ – Ar tonelico hymmnos musical- (August 30, 2006)

• そしてこの宇宙にきらめく君の詩 VOCAL COLLECTION / Soshite kono Uchuu ni Kirameku Kimi no Uta VOCAL COLLECTION (February 22, 2007)

• スピカ～心が紡ぐ贈りもの～ -Ar tonelico hymmnos musical- / Spica~Kokoro ga Tsumugu Okurimono (A Heart-Weaving Present)~ – Ar tonelico hymmnos musical- (February 28, 2007)

• 澪~ミオ~Ar tonelico II Hymmnos Concert Side.蒼~ / Waterway~Mio~ Ar tonelico II Hymmnos Concert Side Blue (October 24, 2007)

• Lip on Hip CompilationCD Vol.2 (January 1, 2001)

• 燕のいる駅/その鉄塔に男たちはいるという / Tsubame no iru Eki/Sono Tettou ni Otokotachi wa Irutoiu (May 31, 2001)

• Lip on Hip Compilation CD Vol.3 (December 29, 2006)

• ディエスイレ～Also sprach Zarathustra～ドラマCD ヴェーアヴォルフ / Diesirae ～Also sprach Zarathustra～ DramaCD Wehrwolf (December 29, 2006)

• BELOVED LIVE 320 満開の桜の樹の下で (October 1, 2007)

• CHARMS (October 5, 2007)