Idol rock is a subgenre of J-rock, or Japanese rock music, that focuses on the visual and performance aspects of the music. It is characterized by its use of elaborate costumes, choreography, and stage effects, as well as its emphasis on the personalities and charisma of the performers. Idol rock bands often include both male and female members, and their music ranges from upbeat pop-rock to heavier metal-influenced sounds. The genre has gained a large following in Japan and around the world.