Yamato and the ultimate-weapon trap

In this reading, Japan answered limited shipbuilding capacity by pursuing decisive qualitative superiority through Yamato and the still larger A-150 ideas. Such an ultimate weapon could create short-term uncertainty or even push an exposed American battle fleet back from Pearl Harbor if its capabilities became known before war. The advantage would be temporary because Britain and the United States could revive 18-inch and 16.5-inch studies, then build improved counters in greater numbers from deeper industrial bases. Japan's expensive leap would therefore provoke the kind of competition its infrastructure was least able to sustain, turning a bid for security into a long-term strategic trap.