Only one battleship of the entire 12-ship Imperial Japanese Naval fleet survived WWII. Named Nagato, she was an important vessel in the war and was the flagship for the strike force that descended on Pearl Harbor.
During the surrender ceremony, Nagato was present in Tokyo Bay. However, she was taken by the US as terms of the surrender. The ship had seen better days after serving in the war, and she couldn’t be used for much. That was the main reason why the Nagato was used as target practice and sank during an atomic bomb test at Bikini Atoll.