Yamato (大和) was the lead ship of her class of battleship built for the Imperial Japanese Navy (IJN) shortly before world war II. She and her sister ship, Musashi, were the heaviest and most powerfully armed battleships ever constructed, displacing 72,800 tonnes at full load and armed with nine 46 cm (18.1 in) Type 94 main guns, which were the largest guns ever mounted on a warship.