The first wave of Hallyu hits Japan in the early 2000s. Millions of Japanese girls and young women are in a craze over it. Japanese men are confounded, it took them a while to realize how explosive the popularity of Korean male celebrities was with women. The Japanese government even had to intervene and put an official end to Hallyu in Japan before a demographic disaster occurred. Between the beginning and end of the wave was DBSK. And after they became TVXQ those millions of Japanese females who fell for Korean idols now had jobs and a lot of money to spare. No dating Japanese men, no marriage, no kids. All the disposable income going to indulge themselves in reliving a happy moment in their youth. And as the peddlers of this SM made bank.