One thing I've learnt mongering around the world is that Japs know how to take huge loads better than any other Asians. They're usually not my favourite to fuck cos of their silly ways, but to cum on they're the best.
Yes, bukkake is a Japanese "invention" in the porn world, but it seems to me that most often individual women in Japanese porn rarely take cum shots in their mouth and enjoy swallowing it. Too often, it seems they spit it out into their hands or just play with it.