The Japanese entertainment industry stands as one of the most influential and distinct sectors globally. Historically characterized by a unique domestic market insularity ("Galápagos syndrome"), the industry is currently undergoing a paradigm shift driven by digital transformation and international streaming platforms. Japan remains the world’s second-largest recorded music market and a top-tier box office territory. This report analyzes the interplay between traditional cultural structures and modern global expansion strategies in Anime, Gaming, Music (J-Pop), and Film/Television.