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The Kongō-class battlecruiser (金剛型巡洋戦艦 Kongō-gata jun'yōsenkan) was a class of four battlecruisers built for the Imperial Japanese Navy (IJN) immediately before World War I. Designed by British naval architect George Thurston, the lead ship of the class was the last Japanese capital ship constructed outside Japan, by Vickers.

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The design of the Kongō-class battlecruisers came about as a result of the IJN's modernization programs, as well as the perceived need to compete with the British Royal Navy.

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The ships had a length of 214.58 meters (704 ft 0 in) overall and a beam of 28.04 meters (92 ft 0 in). They had a draft of 8.22 meters (27 ft 0 in) and displaced 27,384 metric tons (26,952 long tons) at normal load.