Hello! Project is a Japanese music collective formed in 1998 by Tsunku, a well-known songwriter and producer. It features various idol groups and solo artists, primarily focusing on pop music. The project is known for its rotating lineup, with new members joining and others graduating over time, which keeps the groups fresh and dynamic. The most famous group within Hello! Project is Morning Musume, which debuted in 1997 and has released numerous hit songs. Other notable groups include Berryz Kobo, C-ute, and Angerme. The collective has played a significant role in shaping the Japanese idol industry and continues to influence pop culture today.