Per report from the Korean Central News Agency, i.e.  NK state media.

News that NK has continued developing nuclear weapons and delivery systems (ballistic missiles, missile-capable submarines) have hammered home the naivety of the ‘summits’ called by the US administration. If NK ramps up aggression you can expect that to be a positive input for the yen on a ‘flight to safety’ (liquidity) basis.

Winners are grinners.