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.

The narrative focuses on the immediate aftermath of the design competition and the formal steps taken by the Navy to finalize the "Type A" (Yamato) plan.

Preventing the construction of the Battleship Yamato to stop the war A 2019 live-action film starring Masaki Suda If you'd like, I can:

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