@KurtGodel7:
The U.S. produced 48,000 military aircraft in WWII, as compared to 9,000 for Japan. None of the weapons systems, tactics, or strategies discussed in this thread could have solved the problems that production disparity implied.
That said, if I had to pick something from the list; I’d choose radar. Radar might well have allowed the Japanese to win at Midway; thereby lengthening their temporary naval advantage over the U.S. A victory at Mkdway might, if they were lucky, have bought them an extra year.
In 1944, Japan produced 28,000 military aircraft; as compared to 96,000 for the U.S. Put another way: Japan had tripled its aircraft production; whereas America’s has merely doubled. Given enough time; Japan might have been able to close more of the production gap. But radar alone would have been insufficient to accomplish that.
I believe your first figure above is for 1942 rather than WWII.
The ratio increase is probably misleading though, as it is difficult to see how Japan could have fielded an even greater number of aircraft even if it could have produced them (pilot training was a major problem.) The Japanese aircraft industry was largely safe from attack until the last few weeks of 1944 so it might be that they were near maximum production anyway.
The mix had shifted upward to nearly 50% fighters for Japan whereas the US built about 40% fighters during 1944 (heavier multi-engine aircraft like heavy bombers, med. bombers, and transports.) Japanese tank production peaked at 1200 in 1942 and shrank to only 295 in 1944. Japanese warship production had been nearly flat since 1941 with a spike in 1944 (unneeded carriers it appears, without planes, and one of the converted Yamato class BB’s as a carrier.) Together, this indicates that Japanese industry was already tapped out just building aircraft…that and merchant vessels. Japan had gone from producing 260,000 tons of merchant vessels in 1942 to 1,699,000 in 1944…but lost 4,115,000 tons in 1944 alone.
You don’t even want to see how much the U.S. figures for all the above classes dwarf the Japanese ones.