Kinda missed this, but apparently SK is looking at nuclear subs and some discussion that they might be bought into the submarine part of the aukus deal. There are various sources talking about, hard to tell if they just reprinting the same dodgy source or genuine multiple sources. If SK gets one going to assume japan might be try and jump aboard as well. H I Sutton wrote an article for naval news or you can just google to see a list of sources and look at your preffered one