USD/JPY
2011-05-16: 081.32
2012-05-12: 079.72 (-02% y/y, essentially flat)
2013-05-13: 102.21 (+28% y/y, very strong gain)
2014-05-19: 101.55 (-01% y/y, flat)
2015-05-14: 119.49 (+18% y/y, strong gain)
During this entire period, the three largest drops were minor corrections of 7% (once) and 6% (twice). None of those corrections led to a new low. In fact, after each low the USD rebounded to new highs in less than a year.
As of today, the rate is a mere 1.5% below its recent peak achieved on 9th March. That's not even a correction, it's just noise.
Analyze the numbers however you like, the trend has been up. In the last 4 years the USD has exhibited systemic strength agains the JPY, climbing 47% with no periods of systemic weakness.
* Source: Bloomberg Financial News, readily verified by a hundred other sources