Shinano aircraft carrier with feet of clay
The Imperial Japanese Navy began the war of the Pacific with 10 aircraft carrier, at that time the largest and most modern fleet in the world of this type. Although some Japanese carriers, in accordance with the limitations imposed to the Navy from Washington and London Naval Conference, they were small in size. At the beginning of hostilities the United States possessed 6 aircraft carrier, of which only 3 they operated in the Pacific, While the United Kingdom had 3, of which only 1 operating in the Indian Ocean.
Source: Defense Online