Of course they do, that's even why Japan has been pretty much not allowed having an army for the past 80 years. It is common practice, after big wars, to negot

Of course they do, that's even why Japan has been pretty much not allowed having an army for the past 80 years. It is common practice, after big wars, to negotiate what newly created states can or cannot do, this was done in Europe for centuries (Belgium, Poland were often under such constraints and used as buffer zone between empires).