Japanese part and I can see why? There must be the redline drawn by Japan and I don't think your South Korean ever crossed yet.  Sinking Japanese ships is a declaration of war. 

As for the Ruski occupying Japanese Island, it has been since the Japanese lost World War II.  That's the consequences of any war.  You risk losing everything even your neck.  You started the aggression and failed to finish it then you paid the price for it. The mighty Israel also took some land from a six-day war.