We need to encourage Japanese re-armament toute suite.
They are better armed than you might think. They 've got a small blue water Navy, an Air Force that can easily reach North Korea, (Which includes F-15Js, E-767 AWACS, indigenously built fighters).
BTW, the South Koreans have F-15Ks, pretty much the same as USAF F-15E Strike Eagles, with LANTIRN precision targeting, navigation, and terrain following pods.
I'd be button popping if those -Ks took out Little Kim, since I worked on the design of the terrain following system, which would be very useful in the mountainous terrain of the Koreas.