The Japanese Army’s Yamato Class Battleship was an extremely powerful battleship that was launched during World War II. The battleship had incredibly powerful defenses, and had it been in use earlier it could possibly have impacted some key aspects of the war. Here, Daniel Boustead returns and considers its effectiveness, ‘what if’ scenarios, and how events turned against the battleship towards the end of the war.
Yamato battleship during trials in October 1941.
The Yamato Class Battleship was the most destructive ship ever constructed in history. The Yamato Class was created to fulfill a specific technological, strategic, and tactical goal. The technical information alone about the Yamato Class leads to the conclusion it could defeat any ship on the seas, and had events gone differently for the Japanese Military the Yamato Class could have been a game changer! The changing situation of the Pacific War ultimately doomed the Yamato Class ‘s fate - it could have helped Imperial Japan win the Pacific War had the military situation been different and had the battleship been deployed earlier.
The Yamato Class was designed to defeat a huge quantity of enemy naval forces. According to historian and author James Holland, “The Japanese realized they couldn’t possibly hope to catch United States and Great Britain in terms of numbers of warships so the principle behind it was if we can’t get the numbers we will have a qualitative advantage. So, you build an enormous battleship that is basically the equivalent of two or three and which is capable of taking on multiple warships at any one time”([1]).
The tactical and strategic role that the Yamato Class was built to fulfill was the Imperial Japanese Navy’s belief that the fate of an entire war would be determined by a great naval clash involving Battleships (2). This theory was supported by the Battle of Tsushima which occurred on May 27th -May 28th 1905 during the Russo-Japanese War. Like the outcome of the Russo-Japanese War the Imperial Japanese Navy thought, that the war against the United States Navy would be decided in a single great naval clash involving Battleships ([2]). The Imperial Japanese Navy felt that this decisive naval battle would occur after the Japanese military forces seized the Philippines. The U.S. Military would then mount a military campaign to retake their colony of the Philippines and the Imperial Japanese Navy would then decide to engage the United States Navy in a place somewhere in the western Pacific when they felt the time was right to stop the American advance to retake the Philippines. The Imperial Japanese military forces and their government also wanted to seize the oil and other natural resources of China, the Dutch East Indies, Malaysia, Singapore, French Indochina, Brunei, and Burma. The Japanese Yamato Class was designed to both participate in this decisive struggle and sail across the vast Pacific Ocean.
Technologically advanced
The Yamato Class was a technological marvel that could wipe out any ship by its destructive firepower and was virtually impervious to any ship weapon. It was equipped with 18.1-inch Main Guns which could fire a 3,219 lbs. projectile at a rate of 1.5 rounds per minute (3). The range of Yamato Class’s main gun was 25 miles according to Battlefield historical archaeologist Dr. Tony Pollard (4). No other Battleship’s Main Gun has ever had a maximum range of this distance (5).
The Yamato Class’s armor and other protection was unrivalled by any other Battleship. The total weight of the armor was 22,534 tons or 33.1% of the design displacement (6). The armored center section featured a main belt of just over 16 inches of armor inclined at 20 degrees, half of which was below the waterline. The lower armor belt was just under 11 inches in the magazines and 8 inches covering the machinery spaces. The ends of the armored citadel was covered by two transverse bulkheads that were covered by armor that was 11.8 inches thick. Deck armor was between 7.9 inches to 9.1 inches, which was thought to be capable of withstanding armor-piercing bombs of up to 2,200 lbs. dropped from 3,280 feet. The front of the barbettes was covered by 21.5 inches of armor plate with sides covered by 16 inches of armor, both specially hardened. The three main turrets had some 26 inches of armor on their face, 10 inches of armor on the sides, 9.5 inches of armor in the rear, and almost 11 inches of armor on the roofs. The conning tower was covered by a maximum of 19.7 inches of steel armor. A torpedo bulge was also fitted, which extended 9.25 feet from the main belt, from the waterline to the bottom of the ship. According to historian Mike Pavelec, Americans brought the Yamato’s 26.1 inches Turret Facing Steel Armor plate, which they found and recovered from a Japanese naval yard after World War II and ran a test on it (7). The conclusion from this test was that they were able only to penetrate the Turret Facing Armor at point blank range. This type of hit would never have occurred under wartime ocean warfare conditions. Therefore, the turret face armor of the Yamato was virtually impregnable. It would have been a suicide mission for any U.S. Battleship to engage the Yamato Class in combat.
American battleships
The American Battleships were thinly armored and outgunned by comparison to the Yamato Class Battleship. The Iowa Class Battleship was only equipped with a 16 inch Main Guns (8). The Armor on the Iowa Class Battleship was between 12 inches to 1.6 inches on the belt, armored deck was between 6 inches and 1.5 inches of armor, bulkheads were equipped with 11.3 inches of armor, and the main turrets were equipped with 19.7 inches of armor. It was considered the best American Battleship of World War II simply because it had a top speed of 33 knots. In contrast the Yamato Class only had a top speed of 27.5 knots (9) - although the Yamato Class could have still engaged and destroyed the Iowa Class Battleship as it was trying to run away because of the long range of its guns. The reason for this is that the Iowa Class Battleship was so thinly armored.
What if?
The Japanese Military missed many opportunities to utilize the Yamato Class Battleship. It could have been a decisive war-winning weapon. Two examples of this were: Japanese airpower did not destroy two tank farms which contained millions of barrels of fuel oil and they did not destroy the indispensable ship-repair facilities during the Pearl Harbor Attack on December 7, 1941 (10). If the Japanese had destroyed the two tank farms and the ship-repair facilities at Pearl Harbor on that day, and then combined that with an air bombing and submarine shelling campaign led by the Yamato Class on the oil production facilities on the West Coast, and by a knockout sea and air strike on the Panama Canal, it would have crippled the USA’s ability to make war. If the Japanese had commissioned the Yamato Class sooner, then they would have participated in this theoretical strike, and it would have made a decisive difference. Also, if the Japanese Military and Government had decided to both not attack Pearl Harbor and not invade the Philippines but decided to just focus on taking the British Colonies of Southeast Asia and the Dutch East Indies, then the American Isolationist political movement may well have prevented the USA from entering both the War in the Pacific and the War in Europe. Japan still would have succeeded in controlling most of Asia and had their decisive naval battle with the British - and not the Americans. However, all of this did not happen. The Yamato was not considered combat ready until May 27, 1942, and her sistership the Musashi was not commissioned until August 5, 1942 (11). By the time the Yamato Class entered combat the seeds for both the destruction of the Yamato Class and the Imperial Japanese Empire were being sealed.
Less effective?
The changing nature of warfare in the Pacific War ultimately doomed the Yamato Class. The Aircraft Carrier became the dominant and most effective weapon in the Pacific War. The effectiveness of the Aircraft Carrier was brutally demonstrated at such battles as Pearl Harbor, the Battle of Midway, and the Battle of the Philippine Sea. These and other such battles caused the Battleship’s influence to be substantially reduced. In addition, the appearance of American Fighter Planes such as the F6F Hellcat, F4U Corsair, P-38 Lightening, P-47 Thunderbolt, and the P-51 Mustang from the period of 1942 to 1945 marked the end of Japanese air supremacy in the Pacific. The fact that the Japanese no longer had air supremacy made the Yamato Class now very vulnerable to air attack. Lastly, in 1943 the Americans introduced a new explosive called Torpex, with twice the explosive power of TNT (12). This made the Yamato Class’s Anti-Torpedo defenses obsolete because the previous calculations of how much damage they could absorb was based on a warhead that was full of TNT and not Torpex (1). These factors would spell the destructive end of the Yamato Class.
The sister ship of the Yamato, the Musashi, was sunk by American air power during the Battle of Leyte Gulf on October 24, 1944 (13). 1,376 Japanese survivors from the Musashi were rescued; however 1,023 Japanese sailors were lost during the American air attack (14). On April 7, 1945, the Yamato was sunk on its way to attack the American invasion off Okinawa (15). 3,063 Japanese sailors were lost during the American air attack on the Yamato, with only 269 survivors. The Americans losses during the air attack against the Yamato were ten aircraft and 12 aircrew.
No other battleship in history compares to the destructive power of the Yamato Class. The Yamato was created to meet the Imperial Japanese Navy’s need for a battleship to play a key role in their decisive battle strategy scenario. Unfortunately, the Yamato was not ready for Pearl Harbor. The engineering marvel of the Yamato meant it could wipe out any ship opponent on the sea. If the Imperial Japanese Military had not made some fatal strategic miscalculations on the seas, then the Yamato Class would have been a war-winning weapon! However, this did not happen, and the advent of aircraft carrier warfare spelled an end to the Yamato Class. The Yamato was denied the chance of being a war-winning weapon because of military blunders committed by the Imperial Japanese Military.
What do you think of the Yamato class battleship? Let us know below.
Now, you can read World War II history from Daniel: “Did World War Two Japanese Kamikaze Attacks have more Impact than Nazi V-2 Rockets?” here, “Japanese attacks on the USA in World War II” here, and “Was the Italian Military in World War 2 Really that Bad?” here.
[1] Holland, James. “Battleship Yamato”. Nazi Mega Weapons: German Engineering in WW II: World War II Mega Weapons. PBS. 2016.
[2] Stille, Mark E. The Imperial Japanese Navy: In the Pacific War. New York: New York. Osprey Publishing. 2013. 12.
3 Stille , Mark E. The Imperial Japanese Navy: In the Pacific War. New York: New York. Osprey Publishing. 2013. 137.
4 Pollard, Tony. “Battleship Yamato”. Nazi Mega Weapons: German Engineering in WW II: World War II Mega Weapons. PBS. 2016.
5 Nazi Mega Weapons: German Engineering in WW II: World War II Mega Weapons: Battleship Yamato. Darlow Smithson Limited Productions. PBS and National Geographic Channels International. 2016.
6 Stille, Mark E. The Imperial Japanese Navy: In the Pacific War. New York: New York. Osprey Publishing. 2013. 133.
7 Pavelec, Mike. “Battleship Yamato”. Nazi Mega Weapons: German Engineering in WW II: World War II Mega Weapons. PBS. 2016.
8 Hewson, Robert. The World War II Warship Guide. Edison: New Jersey. Chartwell Books, Inc. 2000. 44 to 45.
9 Stille, Mark E. The Imperial Japanese Navy: In the Pacific War. New York: New York. Osprey Publishing. 2013. 141.
10 Van Der Vat, Dan. Introduction by Senator McCain, John. Pearl Harbor: The Day of Infamy-An Illustrated History. Edison: New Jersey. Chartwell Books, Inc. 2007. 138.
11 Stille, Mark E. The Imperial Japanese Navy: In the Pacific War. New York: New York. Osprey Publishing. 2013. 138.
12 Stille, Mark E. The Imperial Japanese Navy: In the Pacific War. New York: New York. Osprey Publishing. 2013. 136.
13 Stille, Mark E. The Imperial Japanese Navy: In the Pacific War. New York: New York. Osprey Publishing. 2013. 139 to 140.
14 Stille, Mark E. The Imperial Japanese Navy: In the Pacific War. New York: New York. Osprey Publishing. 2013. 140.
15 Stille, Mark E. The Imperial Japanese Navy: In the Pacific War. New York: New York. Osprey Publishing. 2013. 141.
References
Hewson, Robert. The World War II Warship Guide. Edison: New Jersey. Chartwell Books, Inc. 2000.
Holland, James. “Battleship Yamato”. Nazi Mega Weapons: German Engineering in WW II: World War II Mega Weapons. PBS. 2016.
Nazi Mega Weapons: German Engineering in WW II: World War II Mega Weapons: Battleship Yamato. Darlow Smithson Limited Productions. PBS and National Geographic Channels International. 2016.
Pavelec, Mike. “Battleship Yamato”. Nazi Mega Weapons: German Engineering in WW II: World War II Mega Weapons. PBS. 2016.
Pollard, Tony. “Battleship Yamato”. Nazi Mega Weapons: German Engineering in WW II: World War II Mega Weapons. PBS. 2016.
Stille, Mark E. The Imperial Japanese Navy: In the Pacific War. New York: New York. Osprey Publishing. 2013.
Van Der Vat, Dan. Introduction by Senator McCain, John. Pearl Harbor: The Day of Infamy-An Illustrated History. Edison: New Jersey. Chartwell Books, Inc, 2007.
