Japanese aircraft carrier Shinano

From World Wars and Prewar Wiki

Shinano (信濃) was an aircraft carrier built by the Imperial Japanese Navy (IJN) during WWII, it was the largest aircraft carrier in the world at the time it was finished. It was laid down in May 1940 as the third of a planned 5 Yamato-class battleships, Shinano's partially complete hull was ordered to be converted into an aircraft carrier because of Japan's need for them after her disastrous loss of four of her original six fleet aircraft carriers at the Battle of Midway in early June 1942.