En el 36 Japón se largó a una carrera naval que no podía ganar.
The sheer number of ships being built between 1937 and 1941 was impressive enough, but in ships completed during those years the us navy still outpaced the Japanese in every type but aircraft carriers, where the United States commissioned just four. In a further ominous sign, Japan’s build-up reflected practically the maximum that its economy and industry could support, while the concurrent American effort was a relatively insignificant sideshow to an economy still on a peacetime footing.
In 1937, the first year since 1921 with no international limits on naval construction, both the United States and Japan spent just over $1 billion on defence, but while the us total represented just 1.5 per cent of a national income of $68 billion, the Japanese figure was 28 per cent of a national income of only $4 billion.
Between 1942 and 1945 the Japanese navy fell only further behind, overwhelmed by the wartime production of the United States. During those years Japan completed 1 battleship (the Musashi), 10 carriers, 5 cruisers, 61 destroyers and 121 submarines, while the us navy added 8 battleships, 112 carriers (including 82 escort carriers), 48 cruisers, 354 destroyers and 203 submarines.
Lawrence Sondhaus, Navies in Modern World History, p. 213