Japanese aircraft carrier Shinano was created on 1944-11-19.

Was the 3rd Yamato class battleship (but was converted to a carrier).

Biggest sunk by a sub, IJN Shinano.

Besides being the largest carrier sunk by a sub, she is mostly famous for being the 3rd sister of the battleship Yamato class. There were supposed to be three Yamato's: Musashi, Shinano, and the Yamato. The battleship Shinano was quickly converted to a carrier to replace the Midway losses.

Prior to the conversion, even in Japan, the battleship was considered the primary warship.

Shinano