Diplomatic relations between Japan and China have frosted to a freezing point since September after dispute over sovereignty of Senkaku, or Diaoyu, a group of uninhabited islets which is currently controlled by Japan but also claimed by China. If any tie between the two Asian powers is unaffected, it would be the one formed by porn. Last week, Sora Aoi, a Japanese porn star who gained fame in China through bootleg and pirated media products on the black market and the world wide Web, started mic More