As a policy/strategy/tactic? No. But as early as the attack on Pearl Harbor, a Japanese flyer, his aircraft damaged, chose to crash his plane into a building. So the basic premise is there.
I was sorta figuring that might be the case. I saw some broadcast on History channel or Military channel not that long ago that dealt with the Kamikaze squadrons - it seemed they became organized in early 1944 if I recall correctly.