Wikipedia:Articles for deletion/Sexy-J
Certainly poorly sourced, but  does not require sources be cited in the article to judge notability. A search of the entertainment press in Japan finds decent coverage in reliable sources: http://www.tokyo-sports.co.jp/entame/entertainment/345067/, https://nikkan-spa.jp/906636, http://www.nikkansports.com/entertainment/news/1752387.html, http://www.asahi.com/and_M/interest/entertainment/Cfettp01702230052.html, http://www.oricon.co.jp/news/2071654/full/, http://wpb.shueisha.co.jp/2016/05/19/65493/, http://www.zakzak.co.jp/entertainment/ent-news/news/20160513/enn1605131140006-n1.htm, etc. The previous commentator was mistaken, and they have charted http://www.oricon.co.jp/prof/636257/rank/, though not very high. But  does not specify how high a band needs to chart to pass criterion 2. Finally, they were the subject of an hour-long broadcast documentary on the Fuji Television network in their long-running documentary series Nonfix: http://www.fujitv.co.jp/nonfix/library/2016/671.html. Also I might add that whether they have fixed membership is irrelevant to this discussion. This is common in idol groups. This is not an overwhelming keep, I believe it passes 
— User:Michitaro, 18:53, 1 March 2017 (UTC)
Stance: keep
Cited policy: WP:NRVE||WP:BAND||WP:GNG (Wikipedia:Notability)