Line chart of Japanese ship production for export, 1948 to 1956, in thousands of displacement tons. Exports are near zero through 1949, rise to about 75 thousand tons in 1950, fall back below 40 through 1952, jump to roughly 307 thousand tons in 1953, dip to about 110 in 1954, and then climb steeply to roughly 1,120 thousand tons in 1956.