An Oral History of The Great Asia Pacific War Vol. VIII Silver Wings over the Home Islands (Harper Publishing & Co. 1965).
We did not know it at the time, but the fires at Nagasaki represented a new allied strategy against our cities. The Americans sent fighter sweeps from their carrier TFs off the coast to clear a way for the B-29s who came over the city in broad daylight at just about 15,000 feet. We got some of them, but they dropped incendiary devices that started some raging fires. It never really got out of control, but there was significant damage done to a number of industrial facilities. And, the damage increased over the period of several days until we were able to extinguish the fires. Had we known this was deliberate we would have stepped up our firefighting capabilities but it took a few more raids for us to catch one.
Maj. General Isiroku Nagani, former deputy chief Home Air Defense, notes of post-war Strategic Bombing Survey interview.
