A brief postscript considers what Japan might have built in 1937-39 if it had continued with Number 13 in place of Yamato. The idea keeps the earlier fast-battleship design as the starting point and raises its protection to Yamato's armour level. The passage is explicitly speculative and does not supply a complete redesign or performance estimate. It points viewers toward the consequences of carrying an early-1920s capital-ship concept into a later technological setting.
Notable Point · 46:38-47:14
Modernising Number 13 with Yamato-era armour
A brief postscript imagines rebuilding Number 13 with Yamato-level protection as a route to a late-1930s Japanese fast battleship.