these things can do, and still want to give any old body (especially one of your example countries that to this day is the most ruthless of all war regimes ever known for their history in the Pacific) the keys to destroy entire populations, well, I'm going to question your decision making.

Doesn't matter how loud the saber rattling is, this world is already too dangerous with the players who own nukes, we don't need small island nations with those capabilities.