Z-1 (band)

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OriginTokyo, Japan
Years active1999–2002
LabelsToshiba EMI
MembersAya Ueto
Mami Nejiki
Manami Nishikawa
Mai Fujiya

Z-1 was a Japanese idol quartet signed under Toshiba EMI from 1999 to 2002. The name Z-1 signifies the last (Z) super stars of the 20th century and the first (1) of the 21st.


  • Ueto, Aya (上戸彩), born on September 14, 1985 in Tokyo.
  • Nejiki, Mami (根食真実), born on October 25, 1985, in Tokyo.
  • Nishikawa, Manami (西脇愛美), born on May 26, 1983, in Kanagawa Prefecture.
  • Fujiya, Mai (藤谷舞), born on October 20, 1984, in Saitama Prefecture


In July 1998, Ueto (special prize winner), Nejiki (musical prize winner), Nishikawa and Fujiya were selected out of the participants of the talent agency Oscar Promotion's 7th All-Japan National Young Beauty contest to form Z-1.

In 1999, the four landed a regular spot on the Fuji TV variety program "Kaishingeki TV Utaemon". They made one of their first appearances at a PR event for the Japanese dub of Pixar's "A Bug's Life". They debuted in July of the same year with the single "Vibe!", released in four versions, each carrying a different remix of the title track.

In 2000, the song "Bakka Mitai!!" ((It's) So Stupid) was banned from airing on NHK due to its mildly vulgar title.

In 2002, after five singles the group disbanded. Ueto went on to pursue a solo career, as well as becoming one of Japan's most prolific young actresses. Nejiki debuted as a solo artist in 2004 while Fujiya enjoyed a short-lived modeling career. Nishikawa is currently a member of the indies rock band "Tarock".

In 2003, Ueto's success as a solo artist prompted Toshiba EMI to release compilation album of all the Z-1 material.



Release Title Weekly Oricon singles chart peak positions and sales Album
Rank Sales
1999/07/16 1st Single
uncharted uncharted All About Z-1
1999/12/08 2nd Single
"You Your You"
95 2,250
2000/05/10 3rd Single
"Bakka Mitai!!"
90 2,310
2000/08/09 4th Single
"Kimete Yaru Summer Love"
92 2,240
2000/11/19 5th Single
"Be My Love"
90 2,130


Release Title Weekly Oricon singles chart peak positions and sales
Rank Sales
2003/03/29 1st Album
"All About Z-1"
uncharted uncharted


  • Kaishingeki TV Utaemon (Fuji TV, 1999)
  • The Yoru mo Hit Parade (NTV, 1999)


External links[edit]