>>>> Very interesting- exactly what is Japan going to fight WITH???
Japan is armed better than one might expect. Its brave "security forces" are probably a bit more on the offensive side than officially required. And they have ABM ships plus a number of fighter-bombers. Don't forget that Japan has been heckled by North Korean spying and kidknappings for the past 30 years or more.
I understand your point: they aren't nuclear and don't have massive fighting divisions. But their help could prove crucial in winning. And I don't think they would be hesitant to join in the hostilities with a ferocity that would surprise even themselves.
OK, I hope you are correct- but I have spent quite a few years in that part of the world, and I do not see the Japanese people being supportive of such a use the JSDF.
Also, there is a political/historical problem, in that the Koreans have not forgotten completely the horrors of the long Japanese occupation. I wouldn't think that North or South would like to see Japanese soldiers there again.