ClariS is a Japanese pop music group which formed in 2009 with singers Clara and Alice from Hokkaido, who were in junior high school at the time.

Birthday was awarded a Gold Disc by the Recording Industry Association of Japan for having exceeded 100,000 copies shipped in a single year.

ClariS' music has been featured in anime series such as Oreimo, Puella Magi Madoka Magica, Nisemonogatari, Nisekoi, and Eromanga Sensei.

They have also performed at the Nippon Budokan, and at anime music events in Japan such as Animax Musix and Animelo Summer Live.

The group's members wear masks during live performances, and their persona has been represented by illustrations drawn by various artists for promotional material.

was released with another attached CD containing the original song "Kimi no Yume o Miyō" (君の夢を見よう), again composed by Kz and sung by ClariS.

[5][9][10] From early on when they uploaded their covers onto Niconico, there was some disbelief whether the girls were actually in junior high school and there were numerous comments on their adult-sounding voices.

[17] Good Smile Company released a Nendoroid Petit set of ClariS in January 2012 based on the illustrations of Clara and Alice by Hiro Kanzaki for "Irony".

5 on Oricon's weekly singles chart,[20] and was used as the opening theme of the 2011 anime television series Puella Magi Madoka Magica.

[21] "Connect" was later awarded the Gold Disc by the Recording Industry Association of Japan (RIAJ) in January 2012 for having exceeded 100,000 copies shipped in a single year.

[27] ClariS released their fourth single "Naisho no Hanashi" (ナイショの話, "Secret Conversation") on February 1, 2012, and it debuted at No.

[35] ClariS released their fifth single "Wake Up" on August 15, 2012;[36] the song is used as the opening theme to the 2012 anime television series Moyashimon Returns.

[37] Their sixth single "Luminous" (ルミナス) was released on October 10, 2012;[38] the song is used as the opening theme to the first two Puella Magi Madoka Magica anime films.

[42] Their eighth single "Colorful" (カラフル) was released on October 30, 2013; the song is used as the opening theme to the film Puella Magi Madoka Magica: Rebellion.

[45][46] Their ninth single "Click", composed by Kz, was released on January 29, 2014; the song is used as the first opening theme to the 2014 anime television series Nisekoi.

[57] ClariS released their 12th single "Anemone" (アネモネ) on July 29, 2015; the song is used as the ending theme to the 2015 anime series Classroom Crisis.

[59] ClariS released their 13th single "Prism" on November 25, 2015; the song was used to promote the 40th anniversary of Sanrio's mascots Kiki and Lala.

[69] They released their 16th single "Hitorigoto" (ヒトリゴト, Soliloquy) on April 26, 2017; the song is used as the opening theme to the 2017 anime series Eromanga Sensei.

[84] In 2023, the duo released a cover of Wink's 1989 single "Samishii Nettaigyo", featuring an arrangement nearly identical to the original.

[87] From their formation until 2014, ClariS consisted of two girls from Hokkaido known as Clara and Alice (both pseudonyms, done so to preserve their anonymity) who were originally in junior high school.

[30][88] ClariS is a portmanteau of the singers' names and was picked as a homage to the character Clarisse from the anime film The Castle of Cagliostro.

[90][91] Both Clara and Alice have been singing since they were in kindergarten when they started taking lessons at the same music school where they met as classmates.

[92] In order to put a priority on their schoolwork, ClariS have not released photos of themselves to the public and employ illustrators to draw their likenesses.