What might happen to U.S. foreign policy, in particular its alliance in East Asia, under the leadership of incoming President Donald Trump? Japan faces an increasingly complex security landscape in East Asia. The Trump presidency could make it more uncertain and more unpredictable.

First, North Korea's nuclear and missile capabilities now pose a direct threat to Japan and its nuclear capability will probably be further upgraded to be able to hit the continental United States sometime during the Trump administration.

Sanctions don't appear to be able to stop North Korean leader Kim Jong Un's military ambitions because he believes a nuclear deterrent is the most reliable and perhaps the only guarantee of his regime.