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Haruna (榛名) was a warship of the Imperial Japanese Navy during World War I and World War II. She was the fourth and last battlecruiser of the Kongō class, amongst the most heavily armed ships in any navy when built. Haruna was formally commissioned in 1915 on the same day as her sister ship, Kirishima. During her career, Haruna underwent two major reconstructions. Beginning in 1926, the Imperial Japanese Navy rebuilt her as a battleship, strengthening her armor and improving her speed and power capabilities. In 1933, her superstructure was completely rebuilt, her speed was increased, and she was equipped with launch catapults for floatplanes. Now fast enough to accompany Japan's growing carrier fleet, Haruna was reclassified as a fast battleship. Haruna's main battery consisted of eight 14 in (36 cm) heavy-caliber main guns in four twin turrets (two forward, two aft). The turrets were noted by the U.S. Office of Naval Intelligence to be "similar to the British 15-inch turrets". Reach 30 kn (56 km/h; 35 mph).