Certainly: genocide.
I quote you:
War by nature is an act of genocide, and the most genocidal strategy is the one that wins.
The Rape of Nanking.
Caution: graphic photos.
photo
photo
photo
photo
And guess what? The Japanese lost, ultimately, even though their behavior was not only inhumane, but inhuman. So much for your "theory".
The only thing the Japanese won was a reputation for brutality, and a place at the dock in a war crimes tribunal. Even though I believe that the bombing of Nagasaki was unnecessary and a mistake rooted in Hiroshima's obliterated communication network, when I look at these photos, Hiroshima doesn't seem so bad.