With how fucked the yen has been, it's hard to imagine others not picking up on this. A while ago I read an interesting article about the "history of QE" which highlighted its origins in Japan in the 90s and described an ongoing shell game between the Japanese government, corporations, and forex markets ever since.
They've kept things afloat over there for 30 some-odd years, despite the cracks being evident for a long time, so the real question is how long the US can keep things together; do they have more leverage because they are the dominant global economy/currency or are things more fundamentally unstable because of the much more massive scale of corruption/deception/manipulation?