A Japanese idol group is a musical ensemble typically composed of young performers, often teenagers or young adults, who sing and dance. These groups are known for their polished performances, catchy songs, and vibrant personalities. Members often engage in various media activities, including television appearances, modeling, and fan events, which help build their popularity. Idol groups can vary in size and concept, ranging from small units to large formations like AKB48 or EXILE. They often have a dedicated fan base, and their success is measured by music sales, concert attendance, and merchandise sales. The idol culture emphasizes a close relationship between the performers and their fans.