USA GHQ occupation forced pacifist constitution to Japan. War Guilt Information Program spread propaganda and controlled media/ history/ books/ schools/ police/ etc. Nothing negative about others were to be taught or reported. Even today, remnant of these things causes Japan’s media to have some anti-japan sentiment. It become convenient tool for propaganda machines such as Chinese “50 cents army”, Korean VANK, USA(too big/smart to have a name?) etc.