Japan participated in World War I from 1914 to 1918 in an alliance with the Entente Powers and played an important role in securing the sea lanes in the South Pacific and Indian Oceans against the German Kaiserliche Marine. Politically, Japan seized the opportunity to expand its sphere of influence in China, and to gain recognition as a great power in postwar geopolitics.
Japan's military seized German possessions in the Pacific and East Asia, but there was no large-scale mobilization of the economy. Foreign Minister Kato Takaaki and Prime Minister Okuma Shigenobu wanted to use the opportunity to expand Japanese influence in China. They enlisted Sun Yat-sen (1866–1925), then in exile in Japan, but they had little success. The Imperial Japanese Navy, a nearly autonomous bureaucratic institution, made its own decision to undertake expansion in the Pacific. It captured Germany's Micronesian territories north of the equator, and ruled the islands until 1921. The operation gave the Navy a rationale for enlarging its budget to double the Army budget and expanding the fleet. The Navy thus gained significant political influence over national and international affairs.
Events of 1914
In the first week of World War I Japan proposed to the United Kingdom, its ally since 1902, that Japan would enter the war if it could take Germany's Pacific territories. On 7 August 1914, the British government officially asked Japan for assistance in destroying the German raiders of the Kaiserliche Marine in and around Chinese waters. Japan sent Germany an ultimatum on 14 August 1914, which went unanswered; Japan then formally declared war on Germany on 23 August 1914. As Vienna refused to withdraw the Austro-Hungarian cruiser SMS Kaiserin Elisabeth from Tsingtao, Japan declared war on Austria-Hungary, too, on 25 August 1914.
Japanese forces quickly occupied German-leased territories in the Far East. On 2 September 1914, Japanese forces landed on China's Shandong Province and surrounded the German settlement at Tsingtao (Kiautschou). During October, acting virtually independently of the civil government, the Imperial Japanese Navy seized several of Germany's island colonies in the Pacific - the Mariana, Caroline, and Marshall Islands - with virtually no resistance. The Japanese Navy conducted the world's first naval-launched air raids against German-held land targets in Shandong province and ships in Qiaozhou Bay from the seaplane-carrier Wakamiya. On 6 September 1914 a seaplane launched by Wakamiya unsuccessfully attacked the Austro-Hungarian cruiser Kaiserin Elisabeth and the German gunboat Jaguar with bombs
The Siege of Tsingtao concluded with the surrender of German colonial forces on 7 November 1914.
Events of 1915–1916
In February 1915, marines from Imperial Japanese Navy ships based in Singapore helped suppress a mutiny by Indian troops against the British government. With Japan's European allies heavily involved in the war in Europe, Japan sought further to consolidate its position in China by presenting the Twenty-One Demands to Chinese President Yuan Shikai in January 1915. If achieved, the Twenty-One Demands would have essentially reduced China to a Japanese protectorate, and at the expense of numerous privileges already enjoyed by the European powers in their respective spheres of influence within China. In the face of slow negotiations with the Chinese government, widespread and increasing anti-Japanese sentiments, and international condemnation (particularly from the United States), Japan withdrew the final group of demands, and the treaty was signed by China on 25 May 1915.
Throughout 1915-1916, German efforts to negotiate a separate peace with Japan failed. On 3 July 1916, Japan and Russia signed a treaty whereby each pledged not to make a separate peace with Germany, and agreed to consultation and common action should the territory or interests of each be threatened by an outside third party. This treaty helped further secure Japan's hegemony in Manchuria and Inner Mongolia.
Events of 1917
On 18 December 1916 the British Admiralty again requested Japan for naval assistance. Two of the four cruisers of the First Special Squadron at Singapore were sent to Cape Town, South Africa, and four destroyers were sent to the Mediterranean Sea for basing out of Malta. Rear-Admiral Sato Kozo on the cruiser Akashi and 10th and 11th destroyer units (eight destroyers) arrived in Malta on 13 April 1917 via Colombo and Port Said. Eventually this Second Special Squadron totaled 17 ships: 1 cruiser, 12 destroyers, 2 ex-British destroyers and 2 sloops.
The Second Special Squadron carried out escort duties for troop transports and anti-submarine operations. The Japanese squadron made a total of 348 escort sorties from Malta, escorting 788 ships containing around 700,000 soldiers, thus contributing greatly to the war effort. A further 7,075 people were rescued from damaged and sinking ships. In return for this assistance, Great Britain recognized Japan's territorial gains in Shantung and in the Pacific islands north of the equator.
When the United States entered the war on 6 April 1917, the Americans and Japanese found themselves on the same side, despite their increasingly acrimonious relations over China and competition for influence in the Pacific. This led to the Lansing-Ishii Agreement of 2 November 1917 to help reduce tensions.
Events of 1918
In 1918, Japan continued to extend its influence and privileges in China via the Nishihara Loans. Following the Bolshevik Revolution in Russia, Japan and the United States sent forces to Siberia in 1918 to bolster the armies of the White Movement leader Admiral Aleksandr Kolchak against the Bolshevik Red Army. In this Siberian Intervention, the Imperial Japanese Army initially planned to send more than 70,000 troops to occupy Siberia as far west as Lake Baykal. The plan was scaled back considerably due to opposition from the United States.
Toward the end of the war, Japan increasingly filled orders for needed war material for its European allies. The wartime boom helped to diversify the country's industry, increase its exports, and transform Japan from a debtor to a creditor nation for the first time. Exports quadrupled from 1913 to 1918. The massive capital influx into Japan and the subsequent industrial boom led to rapid inflation. In August 1918, rice riots caused by this inflation erupted in towns and cities throughout Japan.
Events of 1919
The year 1919 saw Japan's representative Saionji Kinmochi sitting alongside the "Big Four" (Lloyd George, Orlando, Wilson, Clemenceau) powers at the Versailles Peace Conference. Tokyo gained a permanent seat on the Council of the League of Nations, and the Paris Peace Conference confirmed the transfer to Japan of Germany's rights in Shandong. Similarly, Germany's more northerly Pacific islands came under a Japanese mandate, called the South Pacific Mandate. Despite Japan’s relatively small role in World War I (and the Western powers' rejection of its bid for a racial equality clause in subsequent Treaty of Versailles), Japan had emerged as a great power in international politics by the close of the war.
The prosperity brought on by World War I did not last. Although Japan’s light industry had secured a share of the world market, Japan returned to debtor-nation status soon after the end of the war. The ease of Japan’s victory, the negative impact of the Showa recession in 1926, and internal political instabilities helped contribute to the rise of Japanese militarism in the late 1920s to 1930s.
- Dickinson, Frederick R. War and National Reinvention: Japan in the Great War, 1914-1919 (1999) 363pp
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- Frederick R. Dickinson, War and National Reinvention: Japan in the Great War, 1914-1919 (1999)
- Albert A. Altman and Harold Z. Schiffrin, "Sun Yat-Sen and the Japanese, 1914-16," Modern Asian Studies, (July 1972) 6#4 pp 385-400
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- O'Neill, Robert (1993). "Churchill, Japan, and British Security in the Pacific 1904-1942". In Blake, Robert B.; Louis, William Roger. Churchill. Oxford: Clarendon Press. pp. 276. ISBN 0-19-820626-7.
- Donko, Wilhelm M. (2013). "Österreichs Kriegsmarine in Fernost: Alle Fahrten von Schiffen der k.(u.)k. Kriegsmarine nach Ostasien, Australien und Ozeanien von 1820 bis 1914". Berlin: epubli. pp. 4, 156-162, 427.
- Paul E. Dunscomb (2012). Japan's Siberian Intervention, 1918-1922: 'A Great Disobedience Against the People'. Lexington Books. pp. 5, 83. http://books.google.com/books?id=st7yYQTAklMC&pg=PA83.
- This article incorporates public domain material from the Library of Congress Country Studies website http://lcweb2.loc.gov/frd/cs/. - Japan
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