The K-pop Idol System focuses on perfection, performance, and global appeal, with idols undergoing years of rigorous training before debuting. Groups sign fixed-term contracts (typically 7 years), but renewal or disbandment varies. In contrast, the J-pop Idol System emphasizes personality and local fan engagement, with idols debuting young and improving on the job. Instead of fixed contracts, J-pop follows a “graduation system,” where members leave and are replaced, allowing groups to continue indefinitely.