Anime and manga and Japanese video games are now completely mainstreamed into American culture, to the point where often releases are done almost simultaneously

Anime and manga and Japanese video games are now completely mainstreamed into American culture, to the point where often releases are done almost simultaneously in both countries. And the popularity of Frozen is not a surprise, Disney movies were popular in the 80's and 90's too. Korea is having success worldwide, but haven't really dented Japan's media presence in the USA specifically. Gangnam Style is funny because Korea has dumped tons of money and effort into penetrating the USA and mostly failed, and then a funny video by a guy with no presumed capacity for international success literally became a household name.