Japanese decision for war in 1941

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While the Empire of Japan was largely committed to forcible expansion by the late 1930s, specific plans, decisions and preliminary operations (e.g. French Indochina), by the Empire of Japan, were made to begin large-scale operations of World War Two in the Pacific in December 1941, primarily in 1941 but some in 1940. These wre more detailed than broad strategic directions such as the Strike-North and Strike-South Factions, or a decision to consolidate in China and Manchuria.

The decision to go to war, however, is rarely completely rational. In a 2009 paper, Jeffrey Record, of the U.S. Air War College, observes a number of points that led to Japan's decision, and are lessons not to be forgotten by future policymakers:[1]

  1. Fear and honor, “rational” or not, can motivate as much as interest.
  2. There is no substitute for knowledge of a potential adversary’s history and culture.
  3. Deterrence lies in the mind of the deterree, not the deterrer.
  4. Strategy must always inform and guide operations.
  5. Economic sanctioning can be tantamount to an act of war.
  6. The presumption of moral or spiritual superiority can fatally discount the consequences of an enemy’s material superiority.
  7. “Inevitable” war easily becomes a self-fulfilling prophesy.

Record's hypothesis, based on operational behavior and not excusing atrocities, that [2](emphasis in original)

It is the central conclusion of this monograph

that the Japanese decision for war against the United States in 1941 was dictated by Japanese pride and the threatened economic destruction of Japan by the United States. The United States sought to deter Japanese imperial expansion into Southeast Asia by employing its enormous leverage over the Japanese economy; it demanded that Japan withdraw its forces from both Indochina and China—in effect that Japan renounce its empire in exchange for a restoration of trade with the United States and acceptance of American principles of international behavior. Observed Sir Basil Henry Liddell Hart in retrospect: “No Government, least of all the Japanese, could be expected to swallow such

humiliating conditions, and utter loss of face.”[3]

An irony of the situation was that Japanese expansion into Indochina did not directly threaten the United States. The Japanese had two reasons for doing so: to cut off the southern supply route to China, and to obtain bases for the strikes into Southeast Asia. It was American policy, however, to side strongly with China.

Resources

Japan believed her growth was constrained by resources, but, in 1941, she saw resources as adequate for what was hoped to be a short war. The principal goal was obtaining four critical resources in which Japan was not self-sufficient, so economic geography largely dictated the targets of the war:[4]

  • Rice, which could be obtained, given sufficient shipping, from Thailand and French Indochia
  • Fuel.
  • Essential war materials.
    • "Iron.-- ... iron ore for could be supplied from Japan, Manchuria, China (including Hainan Island) and French Indochina.
    • "Nickel.-- The shortage is great and there are no measures for obtaining supplies within our present sphere of influence. It must be obtained from occupied territories in the south.
    • "Crude rubber.--On the basis of an economic agreement, the amount expected from Thailand and French Indochina is 45,000 tons. Domestic requirements are 65,000 tons and the amount on hand is less than 500 tons. Unless the amount procured from French Indochina and Thailand is increased, or a supply of over 20,000 tons is secured from the Netherlands East Indies, the shortage will have a great effect upon domestic industry and especially upon the progress of military preparations.
    • "Tin.--Unless a supply of about 10,000 tons annually is procured from Thailand and French Indochina, not only would it be impossible to meet national requirements, but even peacetime military preparations would come to a standstill. After 2 years of war, present stockpiles would be completely depleted.
    • "Copper.--Supplies on hand will soon be cut in half if the present trend continues. Thus, it will be necessary to develop sources in the Philippines for supplies of copper.
    • "Lead.--If the present situation continues, the supply will be halved. If more lead can be obtained from Burma, the supply will be sufficient.
    • "Cobalt.--Cobalt must be procured from the Netherlands East Indies.
  • Transport capacity." The estimate did not make it clear from where this would come. U.S. submarine operations against Japan were devastating because they concentrated on transport, not warships."

Who were the enemies?

Originally, the Strike-South was to have been of moderate scope, confronting only Britain. This soon expanded, though, to an inevitable confrontation with the Netherlands over Indonesia (then the Dutch East Indies). Confrontation with Australia and the United States were more complex. Japan never had serious intent to invade Australia, but recognized that Australia would be threatened by nearby activities and indeed might compete for some of the same resources. If Japan attack the Philippines, that would be a direct attack on a U.S. territory, but, even if Japan did not, there was the danger that the U.S. would support its Western allies.

To what extent Japan understood it is unclear, but Franklin D. Roosevelt saw anything that interfered with Britain's ability to fight Nazi Germany as of vital strategic interest to the U.S. Malaya and Singapore provided Britain with essential resources.

The situation with France also was complex, as Japan saw Vichy as an ally. Operations in French Indochina, taken in 1940, were transitional, in that they directly bore on the Second Sino-Japanese War, but also would establish bases for Strike-South. Strike-North had largely been rejected due to the rough handling of Japanese troops, by Soviet forces, on the border, including such things as the Nomohan Incident.

As seen by the U.S. Strategic Bombing Study, Japan, led by the radical officers, headed by Hideki Tojjo, who had grown from its successes in Manchuria and an "uneasy coalition with the conservatives" in the Konoe governments,

. ...took Japan to war without concrete minimum or maximum objectives nor any clear conception as to how the war could be brought to a close. The decision to attack was roughly calculated as a two-way gamble. If the European Axis defeated Soviet Russia, Japan would require chips to play on the winning side at the peace settlement with the United States and Britain that might well follow. On the other side, and independent of European events, a quick drive to the Southern Resources Area accompanied by a series of stunning and crippling defeats of the United States forces would redress Japan's relative strength and create a situation in which the United States might be willing to negotiate a peace by trading out the issues on terms favorable to Japan. Great confidence was put in the eventual superiority of Japan's fighting spirit over the potential material superiority of the United States.[5]

1937

Prince Saionji would normally recommended the new Prime Minister, after the fall of Hirota govenrment, but was reluctant to come to the Palace. Told he would not to have to travel to Tokyo. Saionji immediately recommended General Kazushige Ugaki, "who, as Governor General of Korea, had made himself the leader of the army officers who took a moderate position between the Strike North and Strike South Factions. He had the support of the political parties and the cartels. Most important, he was outspoken in his opposition to the planned war of aggression in China." Ugaki did not want the job, and resigned from the reserve. On January 29, Hirohiro convinced him to keep his commission, and he became foreign minister in the cabinet after next. [6]

1940

After preparatory meetings, Prince Konoe was authorized, on 17 July 1940 by Hirohito, to form a cabinet. In a meeting six days before, he had gained the support of President of the Privy Council Yoshimichi Hara, as well as four other prior prime ministers, Senjuro Hayashi, Koki Hirota, Keisuke Okada and Reijiro Watasuki. His cabinet succeeded that of Mitsumasu Yonai.

Among the key portfolios, Hideki Tojo became Army Minister and Yosuke Matsuoka and Foreign Minister. J pp. 373-374</ref>

French Indochina

Japan hoped, especially after the fall of France, to work diplomatically with Vichy France, even before the Tripartite Pact was signed, both to cut off supplies to Chiang Kai-Shek and to establish airbases in French Indochina, needed to strike further south and east.[7]

Georges Catroux, French governor of Indochina, did close the border with China. A Japanese verification group, headed by Major General Issaku Nishimura entered Indochina on June 25. On the same day that Nishimura arrived, Vichy dismissed Catroux, for independent foreign contact. He was replaced by Vice Admiral Jean Decoux, who commanded French naval forces in the Far East, and was based in Saigon. Ducoux and Catroux were in general agreement about policy, and considered managing Nakamura the first priority. [8] Ducoux had additional worries. The senior British admiral in the area, on the way from Hong Kong to Singapore, visited Ducoux and told him that he might be ordered to sink Ducoux's flagship, with the implicit suggestion that Ducoux could save his ships by taking them to Singapore, which appalled Ducoux. While the British had not yet attacked French ships that would not go to the side of the Allies, that would happen at Mers-el-Kabir in North Africa within two weeks;[9] it is not known if that was suggested to, or suspected by, Ducoux. Deliberately delaying, Ducoux did not arrive in Hanoi until July 20, while Catroux stalled Nishimura on basing negotiations, also asking for U.S. help. [10]

1941

The Pearl Harbor striking force set sail on 27 November, but still could be recalled.

Final conference

A December 1 conference brought together Emperor Hirohito, the Cabinet, and others for a total of nineteen leaders. The first question was posted by Privy Council President Yoshimichi Hara, who referred to a 26 November document from Hull to Japanese Ambassador Kichisaburo Nomura,[11] which became one of the key factors in the Japanese choice of war, quoting it (emphasis added) as "the United States has demanded we withdraw troops from all of China." The original English text read only "China". Hara asked for clarification, and Foreign Miniter Togo said it was unclear if the United States had separated Manchuria from China. Throughout the Nomura-Hull talks, China and Manchuria had always been separated, due to a confusing explanation from Togo, no one at the conference assumed so. Hara concluded that war was preferable to accepting the American proposal because

If we were to give in [to the United States, then we would not only give up the fruits of the Sino-Japanese War, and the Russo-Japanese War, but also abandon the results of the Manchurian Incident. There is no way we could endure this....It is clear that the existence of our empire is threatened, that the great achievements of the Emperor Meiji would all come to naught, and that there is nothing else we can do.[12]

References

  1. Jeffrey Record (February 2009), Japan's Decision for War in 1941: Some Enduring Lessons, Strategic Studies Institute, U.S. Army War College, p. ix
  2. Record, p. 6
  3. B.H. Liddell Hart, Strategy,Frederick A. Praeger, 1967, p. 269, quoted in Record, p. 6
  4. Chairman's Office (1 July 1946), APPENDIX A-1. Estimate of Japanese National Strength at the Outbreak of the Greater East Asian War as of December 1941, Japan's Struggle to End the War, United States Strategic Bombing Survey, pp. 14-16
  5. Chairman's Office (1 July 1946), Japan's Struggle to End the War, United States Strategic Bombing Survey
  6. David Bergamini (1971), Japan's Imperial Conspiracy, Morrow, p. 679-680
  7. Merion and Susie Harris (1991), Soldiers of the Sun: the Rise and Fall of the Imperial Japanese Army, Random House, pp. 275-276
  8. Arthur J. Dommen (2001), The Indochinese Experience of the French and the Americans, Indiana University Press pp. 47
  9. Martin Gilbert (1989), The Second World War, Stoddart, p. 107
  10. Dommen, p. 48
  11. Document Handed by the Secretary of State (Hull) to the Japanese Ambassador (Nomura) (26 November 1941), Outline of Proposed Basis for Agreement between the United States and Japan
  12. Herbert P. Bix (2001), Hirohito and the making of modern Japan, Harper Perennial, ISBN 978-0060931308, pp. 431-422