How a war delayed to 1945 changes naval rearmament

If global war were delayed until 1945, would Japan's later carrier aircraft give it a decisive advantage?

Britain and the United States would also gain years to develop their fleets, industry, and overseas support infrastructure.

A 1945-start scenario gives Britain and the United States time to develop alongside Japan. Britain could have Lion-class battleships and more advanced carriers, while the United States enlarged its fleet and industrial base without wartime disruption. More 4.5-inch guns could produce British destroyers resembling the later Daring class through a different sequence of designs. Peacetime investment could also expand ship-support infrastructure in Australia, Canada, and India. The outcome would depend on competing investment choices and technical development, so Japanese aircraft upgrades cannot be considered in isolation.