It was hit by two atomic bombs.
Yugoslavia, who basically nobody cared about, had casualties of 7-10% in WW2.
Big, relevant nations are highlighted way more than the little guys.
2) He's right. Japan post-WW2 endured foreign occupation yes, but without significant internal turmoil. Other states that underwent massive change (e.g. Russia: WW1->Civil War->2 Revolutions) had significant internal turmoil. This helps explain why so many "old" businesses survived in Japan.