Kamen Joshi (仮面女子?), meaning "Masked Girls" in Japanese language, is a Japanese girl group consisted of three smaller teams with several members for each. They are called "Masked Girls" because each member of the group basically wears a mask which covers up their face not to reveal the identity to the public. In reality, they do take off their masks when they need to show off their face on TV and other medias. Unlike normal idols, it is easier for fans to go out and see the girls while Kamen Joshi performs daily at the P.A.R.M.S theater in Akihabara.
Kamen Joshi became the first independent female artist to achieve a number-one single on the Oricon Weekly Singles chart in January 2015, achieving sales figures of over 130,000 copies of their single "Genkidane☆".