Nagato (Japanese: Nagato/Nagato) is a warship of the Great Japanese Imperial Navy (Japanese Navy) [2], and is a warship of Nagato type [3]. Its name comes from the old Changmen State. Since the existence of Yamato and Musashi warships is highly confidential and not open to the public, the Changmen was a symbol of the Japanese navy before the Second World War and was widely known by Japanese citizens [4].At the time of Japan's surrender, only four warships, Changmen, Ishi, Rixiang and Hazel, survived, but only the Changmen warship could sail reluctantly. From 1920 to 1945, when Japan surrendered, the Long Gate warship took part in Pearl Harbor, Midway Island, Philippine Sea, and Reyetai Bay. Each of these is a crucial battle that has a bearing on the fate of the Japanese navy.