How revealing Yamato could have prolonged the battleship age

What would have happened if Japan had publicly revealed Yamato before entering the war?

The reveal could have forced rival powers into an expensive new battleship race by making their existing capital ships look politically and militarily outclassed.

Publishing Yamato's 18-inch-gun specifications in 1941 could have created political and strategic panic well beyond Germany. The disclosure would force rival governments into a dilemma: continue building ships now known to be outclassed, or spend heavily on new infrastructure and larger designs. Britain and the United States would have struggled to defend visibly inferior battle lines in public. Stalin's fear of Japan might also have driven a Soviet super-battleship program, prolonging the battleship age through a wider postwar naval arms race.