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While Tadashi Kai is a fictional protagonist, many characters like Isoroku Yamamoto and the shipbuilding details of the Yamato are grounded in historical records.

The title refers to the official act of signing the preliminary documents for the construction of the massive battleship. Despite Tadashi Kai’s efforts to prove the aircraft carrier's superiority, the political momentum remains with the traditionalist "Big Gun" faction. While Tadashi Kai is a fictional protagonist, many

The series uses mathematical analysis as a lens to critique the historical decisions leading up to World War II. The series uses mathematical analysis as a lens

Kai’s "Archimedean" intellect is used by the very system he tries to reform, creating a paradox where his brilliance may actually help build the weapon he fears. 📖 Series Quick Facts Creator Norifusa Mita (Creator of Dragon Zakura ) Total Length 378 Chapters (38 Volumes) Main Protagonist Tadashi Kai, a genius mathematician Central Conflict a genius mathematician Central Conflict