Japanese Prime Minister Shinzo Abe told parliament on Monday (April 17) he approved the US stance on dealing with North Korea, while the government considers required actions if there is a flow of refugees from the Korean peninsula in case of an escalated conflict.North Korea displayed what appeared to be new long-range and submarine-based missiles on the 105th birth anniversary of its founding father, Kim Il Sung, on Saturday (April 15), as a nuclear-powered US aircraft carrier group steamed towards the region.The United States has warned that a policy of "strategic patience" with North Korea is over. US Vice President Mike Pence travels to South Korea on Sunday on a long-planned 10-day trip to Asia.North Korea on Friday (April 14) denounced the United States for bringing "huge nuclear strategic assets" to the region as the USS Carl Vinson strike group with a flag-ship nuclear-powered aircraft carrier steamed closer.