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Japan 1904 to 1945: WACE Year 12 Modern History

Syllabus dot point

“Japan's emergence as a great power, the strains of the 1920s, the rise of militarism and ultranationalism, imperial expansion, and defeat in World War II”

6 min read

Quick answer

Japan emerged as a great power by defeating Russia in 1905. The relatively liberal "Taisho democracy" of the 1920s gave way, under the strain of the Great Depression and nationalist pressure, to military dominance of government. From the seizure of Manchuria in 1931, Japan expanded aggressively into China from 1937 and the Pacific from 1941, before being defeated by the United States and forced to surrender after the atomic bombings of Hiroshima and Nagasaki in August 1945.

What this dot point is asking

SCSA wants you to trace Japan's development from its arrival as a great power around the Russo-Japanese War of 1904 to 1905 to its catastrophic defeat in 1945. You need to explain how Japan modernised and expanded, the brief flowering and decline of "Taisho democracy" in the 1920s, the turn to militarism and ultranationalism in the 1930s, the drive for empire in China and the Pacific, and why and how Japan was defeated. The elective is examined through source analysis and essays in the external paper.

By 1904 Japan had transformed itself through the Meiji Restoration into a modern industrial and military power. Its victory over Russia in the Russo-Japanese War of 1904 to 1905, the first defeat of a European power by an Asian nation in modern times, confirmed its great-power status, gained it influence in Korea (annexed in 1910) and Manchuria, and fed national pride. Japan's political system combined a parliament (the Diet) with strong elites: the emperor as a sacred figure, the genro (elder statesmen), the bureaucracy and the armed forces, which reported directly to the throne.

The 1920s, the Taisho era, saw moves towards liberalism and party government, sometimes called Taisho democracy. Universal male suffrage was introduced in 1925, party cabinets governed, and Japan participated in international cooperation, signing the Washington Naval Treaties and joining the League of Nations. Yet this period was fragile. The same 1925 reforms came with the repressive Peace Preservation Law. Rural poverty, the vulnerability of an export economy, and resentment of perceived Western limits on Japanese ambition created discontent that nationalist and military factions exploited.

The Manchurian Incident

In September 1931, officers of the Kwantung Army staged the Mukden Incident, an explosion on a Japanese-controlled railway, as a pretext to seize all of Manchuria, which became the puppet state of Manchukuo. The civilian government could not control the army, and Japan defied and then left the League of Nations in 1933. This marked the decisive shift towards military-driven expansion.

The Great Depression devastated Japan's export economy and discredited the party politicians and big business (the zaibatsu) associated with the liberal order. Ultranationalist ideology, glorifying the emperor, the nation and military virtues, gained ground. Assassinations of political leaders, including Prime Minister Inukai in 1932, intimidated civilian government, and the attempted coup of February 1936 entrenched military influence. The army increasingly dictated policy, pursuing autarky and a vision of a Japanese-led Asian order, later named the Greater East Asia Co-Prosperity Sphere.

Expansion became full-scale war. Japan launched all-out invasion of China in 1937, marked by atrocities such as the Nanjing Massacre, but became bogged down in a war it could not win. Western embargoes, especially the American oil embargo of 1941 imposed in response to Japan's move into Indochina, confronted Japan with a choice between retreat and wider war. It chose war, attacking Pearl Harbor on 7 December 1941 and sweeping across Southeast Asia and the Pacific. Initial victories gave way to defeat after Midway in 1942, as American industrial power, island-hopping campaigns and naval blockade ground Japan down. The atomic bombings of Hiroshima and Nagasaki and the Soviet declaration of war in August 1945 forced surrender, and Emperor Hirohito announced capitulation on 15 August 1945.

Answering "Why did Japan go to war with the United States in 1941?"

A common task asks you to explain the decision for war in the Pacific. Build the answer as a chain of pressures and choices.

Step 1: Establish the China quagmire

Show Japan bogged down in a war in China it could not win after the full invasion of 1937, draining resources and creating pressure to secure supplies elsewhere.

Step 2: Explain the resource squeeze

Trace Japan's move into Indochina and the American oil embargo of 1941, which confronted Japan with a stark choice between retreat from China or seizing resources in Southeast Asia.

Step 3: Explain the strategic gamble

Explain that the military-dominated government chose war, attacking Pearl Harbor on 7 December 1941 to cripple the US Pacific Fleet and buy time to consolidate a Southeast Asian empire.

Step 4: Connect ideology and structure

Link the decision to ultranationalist ideology, the Co-Prosperity Sphere vision, and the army's constitutional independence that let it drive policy.

Step 5: Reach a judgement

Conclude that war came from the interaction of the China quagmire, the resource crisis forced by embargo, and an ideology and structure that favoured the military gamble over retreat.

A common error

Do not describe Japan as a simple military dictatorship from the start. Power was contested among the emperor, civilian politicians, bureaucrats, the navy and the army, and factions within the army itself. Strong responses analyse how and why the military came to dominate rather than assuming it always did.

Historiographically, debate centres on whether Japan's expansionism was driven by a coherent long-term plan or by the breakdown of civilian control and factional pressure from below. Some historians stress structural factors, including economic vulnerability and the constitutional independence of the armed forces from civilian government. Others emphasise ideology and the cult of the emperor. The role and responsibility of Hirohito himself remains contested.

Exam-style questions

Questions in the style of SCSA exam questions on this dot point, each with a worked answer. They are written by ExamExplained unless tagged "Past paper"; the year shows the paper a question is modelled on.

WACE 2021-style6 marks
With reference to its origin and purpose, assess the usefulness of Source 2 (a 1930s ultranationalist poster glorifying the emperor and the army) for a historian investigating the rise of militarism in Japan.
Show worked answer →

A 6 mark usefulness question wants origin and purpose tied to a judgement relative to the inquiry.

Origin and purpose. State that the source is an ultranationalist propaganda poster from the 1930s, produced to glorify the emperor, the nation and military virtues and to build support for expansion.

Usefulness. Argue it is very useful as evidence of the ideology that underpinned the rise of militarism: it reveals the cult of the emperor and the glorification of the army that nationalist factions promoted. It is less useful as evidence of how widely these views were genuinely held, since it shows the message, not its reception.

Markers reward the origin-purpose link, a judgement relative to the question, and the recognition that a propaganda source is useful for revealing ideology.

WACE 2023-style16 marks
To what extent did the military come to dominate Japanese government in the 1930s, and why?
Show worked answer →

A 16 mark essay needs a thesis on the degree and causes of military dominance, with precise evidence.

Thesis. Argue that the military progressively came to dominate policy through the 1930s, but that power remained contested among the emperor, civilian politicians and army factions, so dominance was real but not total or instant.

The shift. Trace the Mukden Incident of 1931 and the seizure of Manchuria, which the civilian government could not control; Japan leaving the League in 1933; the assassination of PM Inukai in 1932; and the attempted coup of February 1936.

Causes. Weigh the Depression discrediting the party politicians and zaibatsu, ultranationalist ideology, the army's constitutional independence from civilian control, and rural discontent.

Limits. Note that the navy, civilian bureaucrats and factions within the army all competed, so "domination" was a process, not a single seizure.

Judgement. Conclude that the military came to dictate the broad direction by the late 1930s, driven by economic crisis, ideology and constitutional structure.

Markers reward a weighed thesis, accurate evidence, and a clear answer to "to what extent".

Practise this

Sources & how we know this

ExamExplained