No.
Both Hiroshima and Nagasaki were legitimate military targets by the rule of the day.
Interesting stats though:
290 Canadians died during the battle, many shot or bayoneted after they surrendered. 267 died after the battle, murdered, worked to death, or starved to death. Out of 1,974 Canadian soldiers landed in Hong Kong, 557 died.
In Dec. 1941 the Japanese held 350,000 Chinese prisoners. After more than three additional years of war and prisoner-taking.....with none released, at the end of the war the Japanese held 56 Chinese prisoners.
At Nanking, in China the Japanese murdered an estimated 300,000 Chinese civilians in a few weeks......after the surrender of the city.
Rape was extensive, as many as 80,000........
Add these crimes to the fact of Japan's refusal to surrender and the suicidal determination of her soldiers.......and that the death toll of the otherwise-necessary invasion of the nation was estimated to be 1 million allied troops (plus untold millions of Japanese)...
When the facts are taken together.....anyone that argues the bombings were not a necessity is, IMHO, a revisionist idiot.
I've always wanted to know, if the Japanese were suicidal and willing to fight to the last man, woman and child, why didn't they? Does your book on Hong Kong and POWs explain that?