The Japanese 46 cm/45 Type 94 naval gun (四十五口径九四式四〇糎砲, Yonjūgo-gōkei kyūyon-shiki yonjussenchi-hō) was a 46 cm (18.1 in) naval rifle, the largest ever mounted on a warship. Only two ships carried them, the Imperial Japanese Navy's World War II battleships Yamato and Musashi. They were designated as a much smaller 41 cm (16.1 in) gun in an effort to hide their true size. In spite of this, there were no battleship-to-battleship engagements involving either completed vessel of the Yamato-class and an enemy warship. Both were sunk by aerial attack.