was a Japanese girl

idol Idol or Idols may refer to: Religion and philosophy * Cult image, a neutral term for a man-made object that is worshipped or venerated for the deity, spirit or demon that it embodies or represents * Murti, a point of focus for devotion or medit ...

group. It was formed in 2013 of 21 finalists (with the average age of 14 years) of the 13th

Japan Bishōjo Contest The is a beauty contest and audition contest name that has been held every year since 1987 in Oscar Promotion, and is the sister pageant of the ''Japan Beautiful Girl Contest''. When a bishōjo wins the Japanese Girl pageant, the first runner-up b ...

and is affiliated to the entertainment company Oscar Promotion.

Members

Former members

* * * * * * * * * * * * * * * * * * * * * * * * * * * *

Discography

Studio albums

Singles

Music videos

Notes

References

External links

*
X21 official fanclub

''Go! Oscar! X21''
— X21's own program on

TV Asahi JOEX-DTV (channel 5), branded as (also known as EX and and stylized as TV asahi), is a television station that is owned and operated by the subsidiary of certified broadcasting holding company , itself controlled by The Asahi Shimbun Compan ...

Ameba official relay

Official blog
on Suta Buro (

Oricon , established in 1999, is the holding company at the head of a Japanese corporate group that supplies statistics and information on music and the music industry in Japan and Western music. It started as, which was founded by Sōkō Koike in Nov ...

Star Blog)
Official blog
on

Mixi is an online Japanese social networking service. It was founded in 1999 and is owned by Mixi, Inc. (). As of September 2012, Mixi had about 14 million monthly active users, with about 8.6 million of those on smartphones. Mixi, Inc. was founded b ...

Official blog
on

Gree GREE (derived from an abbreviation of the "Six degrees of separation" concept) is a Japanese social networking service founded by Yoshikazu Tanaka and operated by GREE, Inc. GREE focuses primarily on mobile games and over ninety percent of its ...

Official blog
on

Livedoor was a Japanese company that functioned as an Internet service provider and operator of a web portal and blog platform before being brought down by a scandal in 2006. The company was founded and led in its first 10 years by Takafumi Horie, known a ...

{{authority control Musical groups established in 2013 2013 establishments in Japan Japanese idol groups Avex Group artists Japanese girl groups Musical groups disestablished in 2018