President Moon Jae - in has tried very hard to make his efforts to restore frozen inter - Korean relations for nine years under two conservative Presidents. However, inter- Korean relations are now in crisis on the Korean peninsula in the atmosphere of the war threat. In reality, Koreans live under the risk of a possible nuclear war on the Korean peninsula. The contributing factors leading to the current crisis on the Korean peninsula include the US-ROK joint military exercises, North Korea's sixth hydrogen nuclear test/ intercontinental ballistic missile (ICBM) launch tests, war of words between the US and North Korean leaders, demonstrations of US strategic assets in 2017 surrounding the Korean peninsula, and so forth. The keynote speech briefly evaluates President Moon's North Korea policy, root-causes of North Korean nuclear armament, five conditions for North Korean nuclear abandonment, and makes a creative proposal for a three-phase roadmap for denuclearization and a peace regime building on the Korean peninsula. Finally, the author will make policy suggestions for inducing North Korea to participate in the 2018 PyeongChang Winter Olympic Games.