Actually, over Japan. The US at least maintained the image of "aiming" at industrial targets in Germany throughout the war (though with the technology of the day, aiming at anything larger than a city with a bomber at 25k feet was wishful thinking). In Japan, though...though the purpose was still to dislocate Japanese manufacturing, given the "cottage industry" nature of much of Japanese industry in 1945 (people were making aircraft parts in their homes, for example), Lemay changed the doctrine of the XX Bomber Command to night firebombing of the most flammable residential suburbs of Japanese cities.