Imperial Japanese Navy's unluckiest ship of World War 2

Right from the start, before the war even broke out, Mogami's career started off badly. She would ultimately require three significant refits, which would cost millions and keep her out of commission for years. In addition to directly sinking five of her own ships, she rammed two heavy cruisers, resulting in their eventual sinking and becoming the victim of friendly fire herself. To round off her unfortunate career, her demise would be brought about by the detonation of four of her own torpedoes.