So apparently this is another reason JP markets have risen so much. This makes sense since many people from asia were going to Japan for holiday that time because the yen was weak so things were cheaper. Not because Japan magically became better. Having a weaker Yen doesn't make the best signs that Japan is returning to its prime.
This is why you should not take western analysis seriously without deeper checking. They have a conclusion first which is China bad, and bend all facts or analysis to reach that conclusion. If you follow that, you will overlook the real factors. Just like how USA claims China is collapsing coz its nominal GDP is not reaching USA despite the main factors being foreign exchange (CNY is kept low on purpose) and inflation.