1) W (Double You) was a Japanese pop duo formed for Ai Kago (加護亜依) and Nozomi Tsuji (辻希美), graduated members of the group Morning Musume (モーニング娘。) when they graduated in 2004. They started off by covering older Japanese pop hits from as far back as the 50s. After their first cover album, they began to release original songs and eventually a second album. In early 2006, the group was put on hiatus due to Kago's involvement in an underage smoking scandal. An upcoming single and third album were canceled. The group ended permanently at the start of 2007 when Kago's contract with their agency was terminated.
2) W - lofi songwriter with acoustic sound.
3) W is a Korean electronic pop-rock band under the record label Fluxus Music. Homepage
4) W is one of the 15 idol units appeared on the social mobile game THE iDOLM@STER: SideM. The unit is a duo consisting of twin brothers and former professional football players Kyosuke Aoi and Yusuke Aoi.
5) W is a Russian Atmospheric Black Metal project of Winter Vampyr.