Years Active






Associated Acts




First Summer Uika
Hirano Nozomi
Momose Momo
Pour Lui

Former Members

Yasui Yuuhi

BILLIE IDLE®︎ is a Japanese pop group founded in 2014 by former BiS members First Summer Uika and Hirano Nozomi. They are produced by Nigo. Their gimmick is being "NOT IDOLS".


Promoting NOT IDOL


Promoting BILLIed IDLE 2.0


Promoting LAST ALBUM


Promoting Bi bi bi bi bi

Img Billie Idle A


Members Edit

Past Members Edit

  • Yasui Yuuhi (Withdrew in summer 2016 due to health issues)

History Edit

Early History, 2014-2015 Edit

In 2014, during BiS' disbandment concert at Yokohama Arena, First Summer Uika and Hirano Nozomi announced their plans to form a new group and would hold auditions for members.

In January 2015, Momose Momo and Yasui Yuuhi were announced as members and BILLIE IDLE®︎ made their official debut in March 2015 with the release of their song ANARCHY IN THE MUSIC SCENE.

Their debut album, IDLE GOSSIP, was released April 1st and the digital single BE MY BOY was released the same day.

In September 2015, they released their second album ROCK "N" ROLL IDLE alongside another digital single, be-bop tu-tu.

2016-2017 Edit

On April 6th, 2016, BILLIE IDLE®︎ released the EP "4 in 1" THE OFFICIAL BOOTLEG. Each track was a solo song for each of the members, with the exception of Hirano Nozomi whose song featured First Summer Uika and other former members of BiS on guest vocals.

In the summer 0f 2016, Yasui Yuuhi went on indefinite hiatus for an unspecified health problem. In September it was announced that Yasui had graduated and would be replaced by Momose Akira, the younger sister of Momo.

BILLIE IDLE®︎'s third studio album, bi bi bi bi bi, was released October 26th with the digital single Nakisou Sunday.

On April 26th 2017, BILLIE IDLE®︎ released two albums at once; a live album, LAUNCHING OUT, and BILLIed IDLE, a best-of album with songs updated with Akira's vocals. BILLIE IDLE®︎ released their first CD single MY WAY in August 2017.

In the Fall, members First Summer Uika and Momose Momo provided guest vocals on the N.E.R.D song "Secret Life Of Tigers".

On November 1st, they released the single Sayonara Romantic and their fourth album LAST ALBUM was released shortly after on the 22nd. While promoting the release of this album, their producer Watanabe Junnosuke claimed that there would be "major changes" to the group in 2018.

2018- Edit

On March 21st, BILLIE IDLE®︎ released P.S.R.I.P. and announced that it would be the final single to feature Watanabe as a producer. On April 1st, BILLIE IDLE®︎ released an "April Fools" video teasing a new member, which was deleted the following day.

On May 12th, former BiS founder and leader Pour Lui made a surprise appearance during the encore of BILLIE IDLE®︎'s P.S.R.I.P Tour finale and it was announced that she would join BILLIE IDLE®︎ on June 6th at their one-man at Akasaka BLITZ. A few days later BILLIE IDLE®︎ announced their second best-of album, BILLIed IDLE 2.0 would be released July 4th. Like the previous BILLIed IDLE album, all the songs were re-recorded to include Pour Lui's vocals.

On November 7th, BILLIE IDLE®︎'s first original album with Pour Lui, NOT IDOL, was released. A song from the album, Bye Bye Loneliness, was later released as a single on December 19th.

On January 23rd, they released their third single, Soshite, Mata.. digitally. It received a general release on February 2nd. They will release another single in May.

Discography Edit

Albums Edit

Mini-Albums Edit

Best-of Albums Edit

Live Albums Edit

Singles Edit

Trivia Edit

  • Even though they are not considered an official WACK unit, BILLIE IDLE®︎ has several ties to WACK; Uika, Nozomi and Pour Lui are all former members of BiS, were produced by Watanabe Junnosuke from their formation until 2018, and they regularly perform alongside official WACK groups. In addition, they are listed on the Artists page of the official WACK website.
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