Japanese Colonial Rule (일제강점기): 1910–1945

In 1910, Korea ceased to exist as a sovereign state. The Japanese Empire formally annexed the peninsula, erased the Korean imperial government, and began a 35-year project of political control, economic extraction, and cultural suppression. The events of 1910–1945 are not distant history in Korea. They are the source of wounds, debates, and diplomatic tensions that remain unresolved in the present.

어떻게 일어났나 (How It Happened)

The annexation didn't arrive without warning. Japan had been expanding its influence over Korea since the 1876 강화도조약 (Ganghwado Treaty) — the first of a series of unequal treaties forced on a weakening 조선 Dynasty. The 1895 assassination of 명성황후 (Empress Myeongseong) — carried out by Japanese agents — removed one of the most significant voices of resistance within the Korean court. The 을사조약 (Eulsa Treaty) of 1905 stripped Korea of its diplomatic sovereignty. By 1910, the formal annexation was the final step in a process already well underway.

The document was signed on August 22, 1910, and made public August 29 — a date Koreans call 국치일 (Gukchil, National Humiliation Day).

식민지 통치의 성격 (The Nature of Colonial Rule)

토지 수탈 (Land Seizure)

One of the earliest and most economically devastating policies was the 토지조사사업 (Land Survey Project, 1910–1918). Under the guise of modernizing land registration, vast amounts of land were reclassified as state property — transferred to Japanese ownership or to Korean landlords who cooperated with the colonial government. Korean farmers who had worked land for generations under traditional communal arrangements lost legal title. Many became tenant farmers or migrated to Manchuria and Japan seeking work.

문화 말살 (Cultural Suppression)

Japanese colonial policy in its later phases — particularly after the 1930s — actively suppressed Korean language and identity. Korean-language instruction in schools was reduced and eventually banned. Koreans were pressured to adopt Japanese names under the 창씨개명 (Changssi Gaemyeong) policy. Newspapers published in Korean were shut down. The goal was assimilation: the erasure of Korean distinctiveness into a unified Japanese imperial identity.

Tip — 창씨개명의 현실 (The reality of name changes): The name-change policy was officially voluntary but enforced through pressure — families who refused faced discrimination in employment, education, and daily administration. Estimates suggest roughly 80% of Korean families eventually complied. The policy is one of the most personally felt aspects of the colonial period in Korean historical memory.

강제 노동과 위안부 (Forced Labor and Comfort Women)

As Japan's war in the Pacific escalated through the 1930s and 1940s, Koreans were mobilized — often by force — to support the war effort. Korean men were conscripted into the Japanese military or sent to labor in mines, factories, and construction sites across Japan and the occupied territories. Korean women were recruited or coerced into the military comfort system as 위안부 (wianbu, comfort women) — euphemistically named women forced into sexual slavery for Japanese imperial troops.

The number of Korean comfort women is historically contested, but estimates range from tens of thousands to over 100,000. The survivors — referred to in Korean as 할머니들 (halmonidul, grandmothers) — became central figures in postwar demands for Japanese acknowledgment and reparation. The issue remains one of the most sensitive points in Korea-Japan relations. Japan's official position, the adequacy of past apologies, and the legal status of reparations have been disputed across multiple decades and diplomatic agreements.

The 수요시위 (Wednesday Demonstration) — a weekly protest held outside the Japanese Embassy in Seoul since 1992 — is one of the longest-running regular protests in the world. A statue of a girl, 소녀상 (Sonyeosang), representing the comfort women, now stands at the original protest site and has been replicated in cities worldwide.

저항 (Resistance)

Korean resistance to Japanese rule was persistent and took many forms — from organized armed resistance in Manchuria to cultural preservation efforts to mass civic protest.

3·1운동 (March 1st Movement, 1919)

On March 1, 1919, coordinated demonstrations broke out across Korea. Inspired by Woodrow Wilson's Fourteen Points and the principle of national self-determination, Korean activists had drafted a 독립선언서 (Declaration of Independence) signed by 33 representatives. The declaration was read publicly in 탑골공원 (Tapgol Park) in Seoul, and protests spread to cities, towns, and villages across the peninsula.

The Japanese response was violent. The 제암리 학살 (Jeamni Massacre) — in which Japanese police locked villagers in a church and set it on fire — is one of the most documented atrocities. Estimates of those killed in the broader crackdown range from several hundred to several thousand.

The 3·1운동 failed to achieve independence, but it permanently altered the resistance movement — intensifying the overseas independence effort, strengthening the 대한민국 임시정부 (Korean Provisional Government) established in Shanghai, and embedding March 1st as a national symbol. 삼일절 (Samiljeol), March 1st, remains a public holiday in South Korea.

Tip — 유관순 (Yu Gwan-sun): The most celebrated figure of the 3·1운동 is 유관순 (Yu Gwan-sun), a 16-year-old student who organized demonstrations in her home village of 천안 (Cheonan) after the Seoul protests. She was arrested, tortured, and died in prison in 1920. She is one of the most recognizable symbols of Korean resistance and appears in school curricula, films, and commemorations.

무장 독립운동 (Armed Independence Movement)

In Manchuria and the Russian Far East, Korean independence fighters maintained armed resistance throughout the colonial period. Figures such as 안중근 (An Jung-geun) — who assassinated Japanese Resident-General 이토 히로부미 (Itō Hirobumi) in 1909 — and 김구 (Kim Gu), who led the provisional government, became central figures in Korean nationalist memory.

해방 (Liberation): August 15, 1945

Japan's surrender to the Allied Powers on August 15, 1945 — following the atomic bombings of Hiroshima and Nagasaki — brought colonial rule to an abrupt end. Koreans call the day 광복절 (Gwangbokjeol, Liberation Day), one of Korea's most important national holidays.

Liberation was not clean. The peninsula was immediately divided at the 38th parallel between Soviet and American occupation zones — a temporary administrative arrangement that would harden, within five years, into the division that defines Korea to this day.

Why It Still Matters

The 일제강점기 is not settled history in Northeast Asia. Three specific tensions remain active.

Historical revisionism — debates over the nature of colonial rule, whether Japanese infrastructure development constituted a form of modernization that benefited Korea, and how Korean collaborators should be assessed — remain contentious in both academic and political discourse in Korea and Japan.

Forced labor reparations — Korean courts have ruled that individual victims of forced labor can seek damages from Japanese corporations. Japan contests the legal basis, arguing the issue was resolved by the 1965 Korea-Japan Normalization Treaty.

위안부 — as described above: no diplomatic resolution has held.

Key Facts

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