No.13

Number 13-Class Battleship was one of 4 which were planned to be built for the Imperial Japanese Navy during the 1920s, but cancelled in November 1923 before construction could begin.

Preceded by:  Kii class

Succeeded by: Yamato class

Number 13-Class Battleship,  In the words of naval historian Siegfried Breyer, "had [the ships] been completed, they would have been the world's largest and most powerful battleships. Their gun calibre alone would have caused a new and more intensive naval arms race. From an engineering aspect they were more than ten years ahead of their time because they anticipated the characteristics of the fully developed, fast battleship."