Following Yanagi's departure, Supercell held auditions for vocalists, and 15-year-old female singer Koeda was chosen out of about 2,000 candidates.
Supercell's releases of "Koi wa Sensō" (恋は戦争) on February 22, "World is Mine" (ワールドイズマイン, Wārudo izu Main) on May 31, and "Black Rock Shooter" (ブラック★ロックシューター, Burakku Rokku Shūtā) on June 13; all have received over 4 million views.
4 ranking on Oricon's weekly albums chart,[9] and in June 2009 was awarded the Gold Disc by the Recording Industry Association of Japan for having exceeded 100,000 copies shipped in a single year.
[15] Supercell's third single, "Utakata Hanabi / Hoshi ga Matataku Konna Yoru ni" (うたかた花火 / 星が瞬くこんな夜に), is a double A-side and was released on August 25, 2010.
Supercell joined the label as one of the inaugural members, including others such as Livetune, Gom, Rapbit, and Nagi Yanagi.
[35][36] Ryo wrote the song "Light My Fire" sung by Kotoko,[37] which was used as the first opening theme to the 2011 anime series Shakugan no Shana Final.
[38] Ryo also wrote the song "Naisho no Hanashi" sung by ClariS, which was used as the ending theme to the 2012 anime series Nisemonogatari.
[39] Ryo collaborated with the dōjin musician Jin to produce the split single "Odds & Ends / Sky of Beginning" released on August 29, 2012 by Sony Music Direct.
"Odds & Ends" is the opening theme song to Hatsune Miku: Project DIVA F.[41] In 2012, designer Yoshika Usa collaborated with illustrator Tomoko Fujinoko to create the manga Wooser's Hand-to-Mouth Life, which was adapted into a CG anime series by Sanzigen in 2012.
[42] The anime's ending theme song "Love Me Gimme" (ラブミーギミー, Rabu Mī Gimī) by Tia is written by Ryo,[43] who has continued to produce music for the singer.
[44][45] Supercell's sixth single "Gin'iro Hikōsen" (銀色飛行船) was released on December 19, 2012; the song is used as the opening theme to the 2012 anime film Nerawareta Gakuen.
[46] Supercell's seventh single "The Bravery" was released on March 13, 2013; the song is used as the second ending theme to the 2012 anime series Magi: The Labyrinth of Magic.
[47] Supercell's eighth single "Hakushukassai Utaawase" (拍手喝采歌合) was released on June 12, 2013; the song is used as the opening theme for the 2013 rebroadcast of the 2010 anime series Katanagatari.
[56] Daniel Robson of The Japan Times described Supercell's music as "sentimental J-pop...[that] also explores the genre's jazzier, spunkier and dancier elements.
"[3] Their sound has been compared to pop singers Aiko and Yui,[3] and Ryo has stated himself that he likes expressing human emotions in his music.
[58] While it depends on the song, Ryo has stated he generally "play[s] the piano and take[s] notes of the chord progression" and then writes the lyrics.
[58] Ryo found it difficult at first to write "tenderhearted" lyrics for songs meant to be sung by young women.
The other 10 members provide illustrations, animation, design, and photography in album booklets, cases and music videos.