Donald Trump, the presumptive Republican nominee in the United States presidential election, has repeatedly attacked Japan. Trump's "Japan bashing" centers upon two main points.
The first is that Japan is profiting unfairly by using the weak yen as a weapon with which to ravage the U.S. market. On a related note, Trump has made a full-on attack of the Trans-Pacific Partnership, describing the free trade agreement as "a mortal threat to American manufacturing."
Trump has also attacked Japan's "free ride" under the U.S.-Japan security alliance. Trump says it is strange that the U.S. is obligated to come to Japan's aid if Japan comes under attack from a third country, while Japan bears no such responsibility toward the U.S.