On Dec. 7, 1941, 353 Japanese planes launched from six aircraft carriers destroyed most of the U.S. Pacific Fleet at Pearl Harbor, Hawaii. That morning, 2,402 American servicemen were killed. Until Sept. 11, 2001, this was the highest number of casualties in an attack on the United States.

But 67 years and three generations later, memory fades. And some Japanese are actively trying to rewrite their country's history.

Just...