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W (duo)

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Adapted from the English Wikipedia article W (duo), available under CC BY-SA 4.0Updated 30 November 2025
W
Company typeMusical duo
IndustryMusic
Founded2004
FounderNozomi Tsuji, Ai Kago
Defunct2007
FateDisbanded after contract termination of Ai Kago
Headquarters
Tokyo
,
Japan
Area served
Japan
ProductsMusic albums and singles
ParentUp-Front Promotion

W was a Japanese musical duo established in 2004 under Up-Front Promotion and linked to Hello! Project. The group consisted of Nozomi Tsuji and Ai Kago, both formerly part of the 4th generation lineup of the idol ensemble Morning Musume. Their fame initially stemmed from their involvement with Morning Musume and its sub-unit Mini-Moni.

The creation of W coincided with Tsuji and Kago's scheduled exit from Morning Musume. Prior to their official departure, they launched cover tracks, including their debut single, "Koi no Vacance" (2004), and their initial album, Duo U&U (2004). Following their graduation from Morning Musume, W introduced original singles such as "Aa Ii na!" and "Robo Kiss" within the same year. In 2005, they took leading roles in the musical Mysterious Girl Detectives Cara & Mel: The Case of the Stolen Dangerous Violin and released the single "Miss Love Tantei" connected to the production.

W's activities came to a halt in 2006 after Kago faced suspension due to underage smoking. A planned return in 2007 was canceled when Kago's contract was terminated because of additional misconduct, resulting in the duo's dissolution.

In 2019, W briefly reunited for Hello! Project’s 20th anniversary concert and issued previously shelved works, including "Dō ni mo Tomaranai" and the album W3: Faithful.

2004: Formation and debut

W was introduced soon after Nozomi Tsuji and Ai Kago graduated from Morning Musume. Both had previously performed together in the subgroup Mini Moni and were among the most popular members since joining Morning Musume at age 12. Producer Tsunku chose the name "W" to represent "two Us," highlighting the duo’s partnership.

Their debut EP, Koi no Vacance, was a cover of a 1960 hit originally by The Peanuts. This release was followed by the album Duo U&U, which consisted entirely of covers from female duos active during the Shōwa period, featuring songs by groups like Pink Lady, who appeared alongside W on Japanese television for a special performance.

After their August 2004 graduation concert from Morning Musume, W released their first original single composed by Tsunku, "Aa Ii na!", followed by another original track, "Robo Kiss".

In December 2004, W joined the Hello! Project shuffle unit single "All for One and One for All" as part of the H.P. All Stars. They also shared the stage with Morning Musume during concerts to perform Morning Musume’s final single before graduation, "Joshi Kashimashi Monogatari".

2005: Rise to popularity

In March 2005, W released their second album, 2nd W, which combined Shōwa era J-pop covers with original compositions. This was followed by the single "Ai no Imi o Oshiete!".

During spring 2005, W played lead roles in their inaugural stage musical, Cara & Mel: the Case of the Stolen Dangerous Violin, staged at Yokohama Blitz and Ikebukuro Sun Shine Theater between March 18 and April 10. In September, they released their sixth single, "Miss Love Tantei", accompanied by a music video featuring Kago and Tsuji portraying multiple characters, including their musical personas Cara and Mel. Alongside their recordings, W frequently appeared on Hello! Project’s weekly television program Hello! Morning, often collaborating with Morning Musume members.

2006-2007: Suspension and Group Dissolution

On January 11, 2006, W revealed plans for a new single titled "Dō ni mo Tomaranai," scheduled for release on February 22, alongside their third studio album, W3: Faithful, set for March 15. Nevertheless, both projects were delayed following the emergence of photographs showing Kago smoking underage in February. As a result, Hello! Project placed W's activities on indefinite hold, and Kago was confined to house arrest for one year, prohibited from contacting Tsuji during that period.

In early 2007, after Kago returned to Tokyo and took on administrative roles within her agency, her image suffered further due to additional underage smoking images and allegations involving a contentious trip with a 37-year-old individual. This led to her termination from the agency and the subsequent disbandment of W.

Activities After Disbandment

In 2014, Kago mentioned on her blog that she had reestablished contact with Tsuji. Four years later, in 2018, both were invited as special guests at Hello! Project's 20th anniversary summer concert, which generated significant attention on Twitter. Although they were expected to perform together, Tsuji withdrew owing to maternity leave. The following year, in 2019, they appeared once more as guests at Hello! Project's spring concert and digitally released the previously shelved single "Do ni mo Tomaranai" along with the album W3: Faithful on March 30. The single was issued as a double A-side alongside "Choi Waru Devil." At this event, they performed jointly in front of an audience of 5,000 for the first time in thirteen years.

Studio albums

Compilation of albums with notable chart rankings, sales data, and certifications
Title Year Album information Highest chart positions Sales Certifications
JPN
Oricon
JPN
Hot
Duo U&U 2004 * Release date: June 2, 2004
  • Label: Zetima
  • Format: CD
4 — * JPN sales: 85,017 —
2nd W 2005 * Released: March 2, 2005
  • Label: Zetima
  • Format: CD
11 — * JPN sales: 27,534 —
Choi Waru Devil 2019 * Released: March 30, 2019
  • Label: Zetima
  • Format: Digital download
4 21 Template:Tba —
"—" indicates releases without chart placement or not issued in that market.

Video albums

Title Details Peak chart positions Sales
JPN
W no Satsuei no Sekai vol. 1 * Released on October 14, 2004
  • Label: Zetima
  • Format: DVD
— —
"—" signifies releases that did not chart or were unavailable in that territory.

Singles

Title Year Peak ranking Sales
JPN
"Koi no Vacance" 2004 10 39,226
"Aa Ii na!" 7 41,581
"Robo Kiss" 5 30,239
"Koi no Fuga" 2005 12 20,922
"Ai no Imi o Oshiete!" 11 21,408
"Miss Love Tantei" 13 39,226
"Dō ni mo Tomaranai" / "Choi Waru Devil" (どうにもとまらない/ちょい悪デビル) 2019 — —
"—" represents singles that did not chart or were not released in that region.

Television

Year Title Role Network Remarks
2004-2005 Hello! Morning Themselves TV Tokyo Variety program featuring Morning Musume
2004-2005 Oha Suta Themselves; Cara and Mel personas TV Tokyo Portrayed Cara and Mel characters from January through September 2005

Theatre

Year Title Role Remarks
2005 Mysterious Girl Detectives Cara & Mel: The Case of the Stolen Dangerous Violin (ふしぎ少女探偵 キャラ&メル 魔のヴァイオリン盗難事件) Cara and Mel

Headlining

  • 2004 Summer First Concert Tour ~ W Standby! W & Berryz Kobo (2004)
  • 2005 Summer W & Berryz Kobo Concert Tour: High Score! (2005)

Concert appearances

Publications

  • 20 January 2005 – 50W
  • U+U=W Essaybook

External links