Oshikatsu: Japan's superfan spending boom

From the BBC World Service: Tech giant Amazon says it's blocked more than 1,800 North Koreans from trying to join the company in the past two years. Amazon's chief security officer said North Koreans often try to get hired, then send wages back to fund their government's weapons programs. Plus, "oshikatsu" is a Japanese term referring to fervent fan subcultures surrounding things like sports teams, pop stars, or anime — and it's helped pull Japanese retail sales out of a slump.