飛彈防禦 Missile defense的四層面

Missile defense comprises of:

1. Retaliation

2. Striking an imminent threat

3. Shooting down incoming missiles

4. Evacuation

U.S. & U.K. put emphasis on the first two options.

Israel prepares for all four.

But why does Japan only consider the third?

ASIA.NIKKEI.COM

Japan's 'shield' against North Korean missiles would not have worked