Comment by zmgsabst
Actually, Alaska and the West Coast were attacked during the war — but only relatively lightly.
https://en.wikipedia.org/wiki/Aleutian_Islands_campaign
https://en.wikipedia.org/wiki/Fu-Go_balloon_bomb
https://en.wikipedia.org/wiki/Bombardment_of_Ellwood
That last one, in which a Japanese sub bombarded Santa Barbara, played a role in the later Japanese internment by escalating fears of an invasion.