Kotaku: Cold rain drizzles outside. Inside, everything is pink, round, and frilly. The first floor of this otaku (geek) retailer is plastered with release info for new PC games—adult PC games. A young clerk in glasses near the 18-and-up section taps away on a computer, probably checking inventory. I approach, excusing myself for asking a sudden, if not seemingly random question: "Why is PC gaming in Japan so niche?"