"Re-sublimity" is Kotoko's second maxi single under Geneon Entertainment, released on November 17, 2004. The title track was used as an opening theme for the anime series Kannazuki no Miko while "Agony", its B-side, was used as the ending theme. "Suppuration -core-" was used as a soundtrack for the anime and a rearrangement of the song "Suppuration" appears in her Hane Live Tour 2004 Limited Album. The single peaked at number eight on the Oricon charts and charted for 12 weeks. Since it sold 50,119 copies, this is considered Kotoko's best selling single.
Hane is the first full album by the Japanese artist Kotoko. It was released on April 21, 2004. Later on June 20, 2006, she released an English version of this album with the same title Hane but without its kanji.
"Radiance / Chi ni Kaeru: ～on the Earth～" is Mami Kawada's first single for a major label and Kotoko's third, produced by I've Sound. The songs were used as the opening and ending theme respectively for the anime series Starship Operators. Two versions of the single were released: a limited edition (GNCA-0014) and a regular edition (GNCA-0015). The limited edition included a DVD containing the promotional video for both songs. The single reached #19 on the Oricon charts and stayed for 9 weeks. It sold a total of 28,706 copies.
"being" is the fifth single by Kotoko under Geneon Entertainment. The title track was used as the second opening theme for the anime series Shakugan no Shana. As of January 2014, this remains Kotoko's most successful single since it peaked at #4 in the Oricon charts and sold a total of 34,736 copies.
"Chercher" is Kotoko's sixth maxi single under Geneon Entertainment. The title track was used as an ending theme for OVA of Maria-sama ga Miteru. The lyrics of the song was written by the creator of Maria-sama ga Miteru, Oyuki Konno.
"Hayate no Gotoku!" (ハヤテのごとく！) is Kotoko's eighth maxi single produced by I've Sound and released on May 23, 2007, under Geneon Entertainment. The title track was used as the first opening theme for the anime series Hayate no Gotoku, episodes 1-26. The single peaked at #7 in the Oricon charts selling 19,921 units in its first week of release.
"Shichiten Hakki Shijou Shugi!" (七転八起☆至上主義！) is Kotoko's ninth single, produced by I've Sound under the Geneon Entertainment label. The title track was used as the second opening theme for the anime series Hayate no Gotoku, episodes 27-52. It peaked at the #8 position in the Oricon charts and sold a total of 15,749 copies for two weeks. As of November 26, 2007, it has sold a total of 28,619 copies.
UZU-MAKI is the 3rd album of singer Kotoko under Geneon Entertainment. It was released on December 13, 2006.
This single contains the opening and ending themes for the anime series Onegai Twins. Second Flight by Kotoko and Hiromi Satō is the opening theme while Asu e no Namida by Mami Kawada is the ending theme.
"Shining Stars Bless" is the debut single of I've singer Kaori Utatsuki under Geneon Entertainment. It was released on August 1, 2007. The title track was used as the opening theme for the visual novel/anime Nanatsuiro Drops. It reached #23 in the Oricon charts and has sold a total of 5,339 copies in its first week.
"Chasse" is Kaori Utatsuki's 2nd single under Geneon Entertainment. It was released on November 21, 2007. The title track was used as the third ending theme for the anime series Hayate no Gotoku!. It managed to get in the #30 spot in the Oricon charts with a total sales of 4,984 copies in its first week.
"Real Onigokko" (リアル鬼ごっこ) is Kotoko's tenth maxi single under Geneon Entertainment, released on December 19, 2007. The title track was used as the theme song for the Japanese science fiction thriller movie of the same title, launched in Japan in 2008, starring Takuya Ishida and Mitsuki Tanimura. Real onigokko means "real tag game" in English. The single peaked at the #15 position in the Oricon charts selling 7,588 units in its first week of release.
"Blaze" is Kotoko's eleventh maxi single produced by I've Sound under the Geneon Entertainment label. The single was released on March 12, 2008. The title track was used as the second introductory theme for the anime series Shakugan no Shana Second, starting with episode 16 which was broadcast on January 31, 2008. The B-side, "Sociometry", was used as the ending theme for Shakugan no Shana Second. This is Kotoko's second tie-in with the anime series after her "Being" single.
"L'Oiseau bleu" is a maxi single released by the J-pop singer, Mami Kawada. This was scheduled to be released on June 24, 2009. This is Kawada's first single that has no anime tie-in and also to the first be produced by I've Sound producer C.G mix. This single has also been contained in the I've Sound 10th Anniversary 「Departed to the future」 Special CD BOX which was released on March 25, 2009.
"Snipe" is a maxi single released by the J-pop singer, Kotoko. Released on June 24, 2009, this single is also contained in the I've Sound 10th Anniversary 「Departed to the future」 Special CD BOX, released on March 25, 2009.
Spyglass is the first mini-album by the Japanese singer Kaori Utatsuki. This album was scheduled to be released on August 5, 2009 under the Geneon Universal Entertainment label.
Epsilon no Fune is the 4th album of J-pop singer Kotoko under Geneon Entertainment. It was released on October 14, 2009. This album debuted in the sixth place of the Oricon daily charts, making this album one of the most successful in KOTOKO's musical career.
"Screw" was 14th single by the J-pop singer, Kotoko, was released on December 16, 2009. The title track was used as the theme song for Mamoru Oshii's film Assault Girls.
Anime's Compilation Best is the first compilation album of J-pop singer Kotoko under Geneon Entertainment. It was released on December 23, 2009.
Tears Cyclone: Kai is the title of Japanese singer Kotoko's seventh studio album. It was released on June 27, 2018, through NBCUniversal.
