North Korea and Japan have been at odds since the Second World War. Relations between the two countries have been strained for years.

North Korea has been accused of sending spies to Japan to spy on its citizens. The U.N. Security Council has called for an end to the practice of "blackmailing" the U.S. and South Korea. The United Nations has also called for the end of the use of force by North Korea against its own citizens, and for a return to a more peaceful era of peace.