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Japan possesses a massive, wealthy domestic population. Because Japanese consumers buy physical media (CDs and Blu-rays) and attend live events at high rates, many Japanese entertainment companies historically ignored the global market. They tailored their products strictly to domestic tastes, creating an isolated, highly unique ecosystem—much like the isolated evolution of species on the Galápagos Islands.

Imagine a pop group with 100 members. They perform daily in their own theater in Akihabara. Fans cannot simply stream the music; they must buy multiple CD copies to receive voting ballots to choose which specific member gets to sing lead on the next single. This fosters an intense, almost tribal loyalty.