After more than ten missions aimed at Japanese aircraft manufacturing targets, only the Mitsubishi plants in Nagoya had been seriously disrupted, and that was owed partly to the December earthquake. Nakajima, Tachikawa, and Kawasaki production centers had been attacked without evident success. A Nakajima engine plant in Musashino, Tokyo had been visited five times by Hansell’s B-29s, but remained largely intact.
