[The legendary giant battleship that symbolizes the Japanese Navy] The giant battleship "Yamato", which showed the world the height of Japan's shipbuilding technology, was laid down at the Kure Naval Arsenal in November 1932 and completed in December 1944. It had a waterline length of 256m, a maximum width of 38.9m, and a displacement of approximately 70,000 tons, and was equipped with nine huge guns with a caliber of 46cm.Its size and armament were the largest and most powerful in the world at the time.The main gun was 46cm. The cannon had a maximum firing range of 41 km, and had the power to shoot through 43 cm thick armor plate at a distance of 30 km.On the other hand, in terms of defense, it was equipped with approximately 21,000 tons of defensive armor plate, which was 30% of the standard displacement. Used.The overall length of the ship was kept as short as possible, and a concentrated defense system was adopted in which important parts such as the bridge, turret, and engine parts were concentrated in the center, achieving high defense power.In addition, the most distinctive feature of the ship was its underwater shape. This is the bulbous bow at the bow.The spherical bow, which extends forward by 3m, works with other bows to reduce wave-making resistance.A ship shape with excellent propulsion efficiency has been realized.These technologies were used in post-war Japan. Yamato participated in the battles of Midway and Leyte Gulf, and dominated the Pacific Ocean, but on April 7, 1945, the naval special attack force of Operation Tenichi-go (Operation Kikusui) was passed down as a legacy in the shipbuilding world of Japan. While on his way to Okinawa, he was attacked by over 300 U.S. Navy planes and finally sank into the sea.