War

Russo-Japanese War

日露戦争 (Nichi-Ro sensō) · Русско-японская война (Russko-yaponskaya voyna) · 러일전쟁 (Reo-il jeonjaeng)

1904–1905 ·

In one sentence

The Russo-Japanese War (1904–1905) was fought between the Russian and Japanese empires over control of Manchuria and Korea; Japan’s victory shocked the world, helped spark revolution in Russia, and allowed Japan to make Korea a protectorate.

Start at the top for an easy introduction. Go further down for more detail and scholarship.

  • Easy
  • Intermediate
  • Advanced

For young readers

About 120 years ago, two big empires, Russia and Japan, both wanted to control Korea and a large region of northeast China called Manchuria. Russia had built railways and a naval port there. Japan felt Russia was coming too close.

In February 1904 Japanese ships made a surprise night attack on Russian warships at a port called Port Arthur. The war had begun. But most of the fighting did not happen in Russia or Japan: it happened in Korea, in Manchuria, and in the seas nearby.

The battles were huge and terrible. Soldiers dug trenches, used machine guns and fought for months around hills and forts. In 1905 a Russian fleet sailed halfway around the world to fight, but the Japanese navy destroyed most of it in one great battle near the island of Tsushima.

Japan won. Many people around the world were amazed, because it was the first time in modern history that an Asian country had beaten a big European empire in a major war. People in China, India and elsewhere who wanted freedom from European rule were inspired.

But for Korea the ending was sad. During and after the war, Japan took away Korea’s right to deal with other countries, and five years later, in 1910, Japan took over Korea completely.

At a glance

Dates
8–9 February 1904 (Japanese attack on Port Arthur; war declared 10 February) – 5 September 1905 (Treaty of Portsmouth)
Where
Korea, southern Manchuria (Liaodong Peninsula, Liaoyang, Mukden), the Yellow Sea, the Sea of Japan / East Sea and the Tsushima Strait; Sakhalin
Belligerents
Empire of Japan vs. Russian Empire. Korea (Korean Empire) and Qing China declared neutrality, but the war was fought on their territory
Key leaders
Japan: Emperor Meiji, Katsura Tarō, Ōyama Iwao, Nogi Maresuke, Tōgō Heihachirō, Komura Jutarō. Russia: Nicholas II, Aleksei Kuropatkin, Zinovy Rozhestvensky, Sergei Witte
Main battles
Port Arthur and Chemulpo (Incheon) naval actions, Yalu River, Liaoyang, Shaho, siege of Port Arthur, Mukden, Tsushima
Outcome
Japanese victory. Russia recognized Japan’s “paramount” interests in Korea, transferred the Liaodong lease and the South Manchuria railway, and ceded southern Sakhalin; no indemnity
Military dead
Estimates vary: roughly 43,000–71,000 Russian and 80,000–99,000 Japanese dead, including disease; Chinese and Korean civilian losses were not systematically counted

Easy

What was the Russo-Japanese War?

The Russo-Japanese War was fought from February 1904 to September 1905 between the Russian Empire and the Empire of Japan. The two powers were competing for control of Manchuria, the northeastern region of Qing China, and of Korea, which in 1897 had become the Korean Empire (Daehan Jeguk).

The war was fought almost entirely outside the two combatants’ home territories: in Korea, in Manchuria, and in the seas around them. Korea and China both declared themselves neutral, but their lands became the battlefield and their peoples bore much of the cost.

Japan won a series of costly victories on land and a crushing victory at sea at Tsushima in May 1905. Both sides were exhausted, and the United States President Theodore Roosevelt mediated a peace signed at Portsmouth, New Hampshire. The result made Japan a great power and cleared the way for its domination of Korea.

Because it involved trenches, machine guns, quick-firing artillery, barbed wire, mines and modern battleships, and because it drew in the diplomacy and finance of many countries, some historians have called it “World War Zero”, a preview of the First World War.

[1][7][9]

Easy

Background: rivalry over Manchuria and Korea

After Japan defeated China in 1894–95, Russia, France and Germany forced Japan to give back the Liaodong Peninsula in the Triple Intervention. Russia then expanded into the same region. It gained the right to build the Chinese Eastern Railway across Manchuria as a shortcut for the Trans-Siberian Railway, and in 1898 leased Port Arthur (Lüshun) and Dalian at the tip of the Liaodong Peninsula, the very place Japan had been forced to give up.

During the Boxer Uprising of 1900, Russia sent large forces into Manchuria and was slow to withdraw them afterwards. In Korea, Russian influence had grown after King Gojong took refuge in the Russian legation in 1896, following the murder of Queen Min by Japanese agents. In 1903 Russian activity at Yongampo, at the mouth of the Yalu River on the Korean side, alarmed Japan further.

Japan sought security in diplomacy. In 1902 it signed the Anglo-Japanese Alliance, under which Britain would stay neutral if Japan fought one power, and join if a second power entered. Japanese leaders proposed dividing influence, Manchuria for Russia and Korea for Japan, but negotiations in 1903 failed. Some Russian leaders underestimated Japan, and some scholars have argued that circles around Nicholas II hoped a short victorious war would strengthen the regime at home, though this is debated.

Korea tried to stay out. In January 1904 the Korean Empire declared its neutrality in any conflict between Russia and Japan. The declaration was ignored.

[1][7][10]

Intermediate

The course of the war

Opening moves (February–May 1904). On the night of 8–9 February 1904 Japanese torpedo boats attacked the Russian Pacific Squadron at Port Arthur, damaging several ships; war was formally declared on 10 February. At almost the same time Japanese troops landed at Incheon (Chemulpo), and on 9 February Japanese ships attacked two Russian vessels in the harbour, the cruiser Varyag and gunboat Koreets, which were scuttled by their crews. Japanese troops occupied Seoul and marched north through Korea. At the Battle of the Yalu River (30 April–1 May), Japan defeated Russian forces and crossed into Manchuria.

Manchuria and Port Arthur (May 1904–January 1905). Japanese armies landed on the Liaodong Peninsula, won at Nanshan, and besieged Port Arthur. The Japanese Third Army under General Nogi Maresuke launched repeated frontal assaults on the fortress’s hills and forts, suffering enormous losses to machine guns and artillery. After the capture of 203 Metre Hill in December, Japanese siege guns could shell the Russian fleet in the harbour, and Port Arthur surrendered on 2 January 1905. Meanwhile the main Japanese armies under Marshal Ōyama Iwao fought the Russian army of General Aleksei Kuropatkin at Liaoyang (August–September 1904) and the Shaho River (October 1904). The Japanese won, but could not destroy the Russian army, which retreated in good order.

Mukden (February–March 1905). The Battle of Mukden (Shenyang) involved more than half a million soldiers along a front about 150 km long, making it one of the largest battles in history up to that time. After weeks of fighting the Russians retreated north. Japan had won, but it was running out of men and money.

Tsushima (May 1905). Russia sent its Baltic Fleet under Admiral Zinovy Rozhestvensky on an 18,000-mile voyage around Africa and across the Indian Ocean. Early in the voyage, in October 1904, Russian ships mistakenly fired on British fishing boats in the North Sea (the Dogger Bank incident), nearly causing war with Britain. On 27–28 May 1905 Admiral Tōgō Heihachirō’s Combined Fleet met the Russian fleet in the Tsushima Strait between Korea and Japan and destroyed or captured most of it, with thousands of Russian sailors killed or taken prisoner; Japan lost only three torpedo boats.

Peace (June–September 1905). Japan, financially strained, asked Theodore Roosevelt to mediate. Russia, shaken by revolution at home, agreed to talks. While negotiations were being arranged, Japan occupied Sakhalin in July 1905 to strengthen its bargaining position. The Treaty of Portsmouth was signed on 5 September 1905 by Komura Jutarō and Sergei Witte.

[1][2][3][4]

Intermediate

Korea during the war: from neutrality to protectorate

For Korea, the war was the decisive step in the loss of sovereignty. Two weeks after landing, on 23 February 1904, Japan forced the Korean government to sign the Japan–Korea Protocol, which allowed Japan to occupy any strategic places it needed in Korea and required Korea to accept Japanese “advice” on administration. Korea’s declaration of neutrality became meaningless.

In August 1904 the First Japan–Korea Agreement required Korea to employ a Japanese financial adviser (Megata Tanetarō) and a foreign diplomatic adviser recommended by Japan (the American Durham Stevens). Japan also demanded rights to reclaim so-called wasteland across Korea, a demand that provoked widespread Korean protest and was withdrawn. Japanese forces requisitioned land for military use and conscripted Korean labourers to build railways such as the Seoul–Uiju (Gyeongui) line for military transport, at great hardship to villagers; Koreans who resisted or sabotaged the lines could be executed under military rule.

In February 1905, during the war, Japan incorporated the islets known in Korea as Dokdo (in Japan as Takeshima) into Shimane Prefecture. South Korea regards this as an illegal act that was part of Japan’s aggression against Korea; Japan maintains that the islets were its territory and that the incorporation was lawful. The dispute continues today.

Japan also secured the approval of the great powers. In the Katsura–Taft memorandum of July 1905, a Japanese and an American leader exchanged views accepting Japanese control of Korea and American control of the Philippines; the second Anglo-Japanese Alliance of August 1905 recognized Japan’s right to control Korea; and at Portsmouth Russia acknowledged Japan’s “paramount political, military and economic interests” in Korea. On 17 November 1905, with Japanese troops surrounding the palace, Itō Hirobumi forced through the Japan–Korea Treaty of 1905 (the Eulsa Treaty), making Korea a Japanese protectorate without the signature of Emperor Gojong.

[7][5][6][4][8]

Intermediate

The human cost

Casualty figures vary with the source. Common estimates put Russian military deaths at roughly 43,000 to 71,000 and Japanese military deaths at roughly 80,000 to 99,000, including deaths from disease; hundreds of thousands more were wounded. Japan, although victorious, lost more soldiers than Russia, largely because of the costly assaults at Port Arthur and in Manchuria. Japanese medical services, however, reduced deaths from disease compared with earlier wars, which impressed foreign observers.

Civilians suffered heavily, especially in Manchuria. Chinese villages were occupied, looted and destroyed; farmers were forced to work as labourers or lost their crops and homes; and some Chinese were executed by one side or the other as suspected spies. The Qing government, officially neutral, could do little to protect them. No reliable count of Chinese civilian deaths exists.

In Korea, labour conscription, requisition of land, food and animals, and military rule placed heavy burdens on villagers along the invasion routes and railways. Russian prisoners and Japanese soldiers also suffered: the Port Arthur garrison had endured scurvy and bombardment, and thousands of Russian prisoners were held in camps in Japan, where they were generally treated according to international conventions.

[1][7]

Intermediate

Consequences

Russia. Defeat deepened discontent at home. On 22 January 1905 (9 January in the old Russian calendar), troops fired on peaceful petitioners in St Petersburg (“Bloody Sunday”), setting off the Revolution of 1905: strikes, peasant uprisings and mutinies, including one on the battleship Potemkin. Nicholas II was forced to issue the October Manifesto promising civil liberties and an elected Duma. Russia turned its attention back to Europe and the Balkans, a shift that contributed to the tensions leading to 1914.

Japan. Japan became recognized as a great power. It gained the Kwantung (Guandong) leased territory and the South Manchuria Railway, which became the base for its later expansion into Manchuria. But the war had been financed largely with foreign loans, and the Treaty of Portsmouth gave no indemnity. When the terms were announced, crowds in Tokyo rioted at Hibiya Park and elsewhere, attacking police boxes and pro-government newspapers. Victory also increased the prestige of the army and navy and the belief that sacrifice in battle could win national greatness.

Korea. The protectorate imposed in 1905 led to the establishment of the Residency-General under Itō Hirobumi. Gojong’s attempt to appeal to the Hague Peace Conference in 1907 led to his forced abdication and the disbanding of the Korean army. Righteous army (uibyeong) resistance spread across the country. In 1909 the Korean independence fighter Ahn Jung-geun assassinated Itō at Harbin, and in 1910 Japan annexed Korea.

The wider world. The victory of an Asian nation over a European empire electrified nationalists in Asia and beyond. Sun Yat-sen in China and the young Jawaharlal Nehru in India later recalled the excitement, and the war is often connected with a wave of constitutional revolutions in Iran (1905–06) and the Ottoman Empire (1908). At the same time Japan itself was becoming a colonial power, so for Koreans and later for Chinese the “Asian victory” meant new domination rather than liberation.

[1][4][6][10]

Advanced

Memory and narratives in different countries

Japan. The war became a national epic in Japan. Admiral Tōgō and General Nogi were revered; Nogi’s suicide after the death of Emperor Meiji in 1912 made him a symbol of loyalty. Shiba Ryōtarō’s historical novel Saka no ue no kumo (Clouds Above the Hill), serialized in 1968–72 and later adapted for television, portrayed Meiji Japan’s struggle as a heroic, defensive effort by a small nation. Critics in Japan and abroad argue that such narratives leave out Korea and China, and make it harder to see the continuity between the Meiji wars and later aggression.

Russia. In Russia the war was remembered as a humiliation caused by incompetent leadership and a distant, unpopular cause, though individual acts of courage, such as the crew of the Varyag, were celebrated in song. Soviet writers used the defeat to condemn tsarism; Aleksei Novikov-Priboy’s novel Tsushima, based on his own experience as a sailor, was widely read. When the Soviet Union took southern Sakhalin and Port Arthur in 1945, Stalin publicly presented this as wiping out the stain of 1904–05.

Korea. Korean narratives see the war as the stage on which Korea’s sovereignty was taken away: neutrality ignored, land and labour requisitioned, Dokdo incorporated, and the protectorate imposed. The Eulsa Treaty is often called the Eulsa neugyak (“forced treaty”), and many Korean scholars argue that it was legally invalid because it was imposed by coercion and never signed by the emperor. Figures of resistance, from the journalist Jang Ji-yeon, whose editorial “Today We Cry Out in Lamentation” denounced the treaty, to Ahn Jung-geun, are central to Korean memory. Ahn’s unfinished essay On Peace in East Asia argued that Japan had betrayed its promise that the war was fought for the peace of East Asia.

China. For China, the war was fought on Chinese soil between two foreign powers while the government stood by. The writer Lu Xun, then a medical student in Japan, later recalled seeing a lantern slide of a Chinese man about to be executed by Japanese soldiers as a Russian spy, while Chinese onlookers watched passively; he wrote that this experience turned him from medicine to literature. The episode has become a famous symbol of Chinese national awakening. Elsewhere, from Turkey to Southeast Asia, the war was long remembered as proof that European power was not invincible.

[1][6][7][9]

Advanced

Primary sources and historiography

Official and military sources. Both the Japanese General Staff and a Russian military-historical commission produced multi-volume official histories, and the British, German, American and other armies sent observers who wrote detailed reports; the British officer Ian Hamilton published his observations with the Japanese army. General Kuropatkin wrote a defence of his conduct, published in English as The Russian Army and the Japanese War. These sources are rich on operations but often shaped by institutional self-justification; Japanese official histories, for instance, tended to conceal failures and disputes among commanders.

Journalism and images. The war was one of the most intensively reported of its time: war correspondents, including the American writer Jack London, reported from Korea and Manchuria, and photographs, newsreels and illustrated magazines reached mass audiences. Korean newspapers such as the Hwangseong Sinmun and the Daehan Maeil Sinbo, the latter published under the protection of a British owner, Ernest Bethell, recorded Korean reactions despite Japanese censorship.

Diplomatic and Korean sources. Diplomatic archives in Tokyo, St Petersburg, London and Washington document the road to war and the peace negotiations. Korean government records, the Veritable Records of Emperor Gojong, and the documents surrounding the 1904–05 agreements are central to the long-running debate on the legality of the protectorate.

Historiography. Older military histories focused on strategy and leadership. More recent work places the war in global perspective: the multi-author volumes The Russo-Japanese War in Global Perspective: World War Zero (2005–07), edited by John W. Steinberg and others, examine its diplomatic, social, cultural and colonial dimensions, and scholars such as Rotem Kowner have studied its impact on racial ideas and on the peoples of Asia. Korean and Japanese historians continue to debate the legal status of the 1904–1910 treaties, and Chinese historians emphasize the war’s impact on Manchuria. Open questions include how far each government wanted war in 1903–04, how close Japan came to military and financial exhaustion, and how the war shaped the arms race before 1914.

[1][10][6][7]

Battles (18)

  1. Battle of the Yellow Sea1904
  2. Battle of Port peturth1904
  3. Siege of Port Arthur1904–1905
  4. Battle of Liaoyang1904
  5. Battle of Yalu River1904
  6. Battle of Chemulpo Bay1904
  7. Battle of Shaho1904
  8. Battle of Nanshan1904
  9. Battle off Ulsan1904
  10. Battle of Te-li-Ssu1904
  11. Battle of Korsakov1904
  12. Battle of Tashihchiao1904
  13. Battle of Motien Pass1904
  14. Battle of Hsimucheng1904
  15. Battle of Tsushima1905
  16. Battle of Mukden1905
  17. Battle of Sandepu1905
  18. Japanese invasion of Sakhalin1905

Key ideas

Imperial rivalry
Russia and Japan fought not over their own lands but over who would dominate Manchuria and Korea.
Neutrality ignored
Korea and China declared neutrality, but the war was fought on their territory and their sovereignty was overridden.
Protectorate
A state whose foreign affairs are controlled by another; Japan imposed this status on Korea in 1905, a step toward annexation in 1910.
“World War Zero”
A term used by some historians for the war’s modern features and global connections, which foreshadowed the First World War.
Asian victory, colonial power
Japan’s victory inspired anti-colonial nationalists, yet Japan used it to build its own empire in Korea and Manchuria.
Revolution of 1905
Defeat deepened unrest in Russia, forcing Nicholas II to grant a parliament and marking a step toward 1917.
Great-power approval
Britain, the United States and Russia each recognized Japan’s dominance in Korea in 1905, leaving Korea without outside support.

Records

  1. 1898 — Russia leases Port Arthur and Dalian on the Liaodong Peninsula.
  2. 1900 — Boxer Uprising; Russian troops occupy much of Manchuria.
  3. 1902 — Anglo-Japanese Alliance signed.
  4. 1903 — Russian activity at Yongampo on the Korean side of the Yalu; Russian–Japanese negotiations fail.
  5. 1904 — January: the Korean Empire declares neutrality. 8–9 February: Japanese attacks at Port Arthur and Incheon; 23 February: Japan–Korea Protocol.
  6. 1904 — August: First Japan–Korea Agreement; Battle of Liaoyang. October: Dogger Bank incident.
  7. 1905 — 2 January: Port Arthur surrenders. 22 January: Bloody Sunday in St Petersburg. February: Japan incorporates Dokdo/Takeshima into Shimane Prefecture. February–March: Battle of Mukden.
  8. 1905 — 27–28 May: Battle of Tsushima. July: Katsura–Taft memorandum; Japan occupies Sakhalin. August: second Anglo-Japanese Alliance.
  9. 1905 — 5 September: Treaty of Portsmouth; Hibiya riots in Tokyo. 17 November: Eulsa Treaty makes Korea a protectorate.
  10. 1907 — Hague secret emissary affair; Gojong forced to abdicate; Korean army disbanded.
  11. 1909 — Ahn Jung-geun assassinates Itō Hirobumi at Harbin.
  12. 1910 — Japan annexes Korea.

Glossary

Manchuria
The historical name for northeast China, rich in land and resources, where most of the land war was fought.
Port Arthur (Lüshun)
A fortified naval base at the tip of the Liaodong Peninsula, leased by Russia in 1898 and captured by Japan in 1905.
Korean Empire
The name of the Korean state from 1897 to 1910, proclaimed by Gojong.
Protectorate
A state that keeps some internal government but whose foreign affairs are controlled by another power.
Eulsa Treaty
The Japan–Korea Treaty of 17 November 1905, which took away Korea’s diplomatic rights; Koreans often call it a forced treaty.
Baltic Fleet
The Russian fleet that sailed from Europe to East Asia and was destroyed at Tsushima.
Treaty of Portsmouth
The peace treaty of 5 September 1905, mediated by Theodore Roosevelt.
Duma
The elected Russian legislature created after the Revolution of 1905.
Uibyeong (righteous army)
Korean volunteer forces that fought Japanese domination, especially after 1905 and 1907.
Anglo-Japanese Alliance
A treaty of 1902, renewed in 1905, between Britain and Japan that strengthened Japan’s position against Russia.

Questions and answers

Why did Russia and Japan go to war?

Both wanted to control Manchuria and Korea. Russia had moved into Manchuria with railways and a naval base, and Japan feared Russia would take Korea too. Negotiations to divide the region failed.

Why was the war fought in Korea and China?

Because those were the places the two empires were competing over. Korea and China declared neutrality, but neither could stop the armies.

What happened at Tsushima?

In May 1905 the Japanese navy under Admiral Tōgō destroyed most of Russia’s Baltic Fleet, which had sailed halfway around the world. It was one of the most decisive naval battles in history.

Did Japan’s victory help Korea?

No. During and right after the war Japan forced Korea into agreements that took away its control over its own affairs, and in 1905 made it a protectorate. Korea was annexed in 1910.

Why did people riot in Tokyo after Japan won?

The Japanese public had made great sacrifices and expected a large indemnity and more territory. When the Treaty of Portsmouth gave no indemnity, crowds rioted in September 1905.

Is the Eulsa Treaty legally valid?

This is disputed. Many Korean scholars argue it was invalid because it was imposed under military threat and the emperor never signed it. Japan has held other views. In the 1965 Korea–Japan treaty both sides agreed that pre-1910 treaties were “already null and void”, but they interpret “already” differently.

Why is it sometimes called “World War Zero”?

Because it used many weapons and tactics of the First World War, such as trenches and machine guns, and involved the diplomacy and finance of many countries beyond the two combatants.

What did the war mean for people in other Asian countries?

Many anti-colonial nationalists were inspired by an Asian victory over a European empire. But Koreans and, later, Chinese experienced Japan as a new imperial power.

Sources and further reading

  1. Russo-Japanese War. Wikipedia
  2. Siege of Port Arthur. Wikipedia
  3. Battle of Tsushima. Wikipedia
  4. Treaty of Portsmouth. Wikipedia
  5. Japan–Korea Treaty of February 1904. Wikipedia
  6. Japan–Korea Treaty of 1905. Wikipedia
  7. 러일전쟁 (Russo-Japanese War). Encyclopedia of Korean Culture, Academy of Korean Studies
  8. 포츠머스 조약 (Treaty of Portsmouth). Encyclopedia of Korean Culture, Academy of Korean Studies
  9. 러일 전쟁. 위키백과 (Korean Wikipedia)
  10. John W. Steinberg et al. (eds.), The Russo-Japanese War in Global Perspective: World War Zero. Brill, 2005

Related

Written with AI assistance from the published sources listed above, and revised as new research appears.

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