The Japanese industry historically ignored global markets, building a "Galápagos Syndrome" ecosystem (evolving in isolation). For years, Japanese phones had infrared ports and TV tuners that the world didn't use. Music labels blocked YouTube. This is changing (Sony now releases games globally simultaneously), but the insular mindset persists. It is why you still see DVD rental stores in Tokyo, despite Netflix.
The Japanese music scene is the second largest in the world, dominated by a unique "Idol" culture. Groups like AKB48 or Johnny & Associates’ boy bands are built on the concept of "idols you can meet."