The Great War of Archimedes

It is the 1930s. The Japanese Navy sets out to build the world's biggest battleship, named Yamato. Rear Admiral Yamamoto is morally opposed to the idea and his attitude and ethics attract a young naval officer and mathematic genius named Tadashi Kai. Kai begins to look into the money being used to build the battleship and soon uncovers a conspiracy within the military as a nation is dragged toward the inevitability of a catastrophic war.