- January. Yi Yong-ik, former Secretary of the Imperial Treasury, is assassinated in Vladivostok, Russia.
- September. The historic Japanese newspaper in Korea Keijō nippō is founded. The newspaper becomes the de facto official paper of the Japanese Residency-General and later Government-General.
- 통감부 설치KO
- 1904러일 전쟁 발발, 한국과 일본간에 한일의정서 체결
- 1904Battle off Ulsan
- 1904November. The Pre-dreadnought battleship KIS Gwangje (광제호,光濟號) started operation in Incheon, Korea. It had a displacement of 1,056 tonnes. Its full speed was 14.77 knots with 2483 horsepower. The engine was a triple-expansion steam engine. The battleship and was made by Kawasaki Shipbuilding Corporation (川崎造船) and was given the mission for patrolling the Western Korean maritime territory. It is also the first Korean battleship to be equipped with the wireless telegraph.
- 1904July. Landmark newspaper The Korea Daily News, predecessor to today's Seoul Shinmun, is founded by British journalist Ernest Bethell.
- 1904September. Jejungwon hospital in Seoul, was renamed Severance Hospital, added Severance Hospital Medical School and the attached School of Nursing.
- 1904March. The first meteorological observatories were constructed in Mokpo and various other places.
- 1905May. Yi Yong-ik (이용익,李容翊), Secretary of the Imperial Treasury, established Bosung College (보성학교,普成學校), later to be known as the Korea University (고려대학교,高麗大學校).
- 1905November. Japan declared Korea a protectorate after success at the Russo-Japanese War. Japan forced Korea to sign the Eulsa Treaty (을사조약,乙巳條約), for formalisation of its sphere of influence around the Korean Peninsula.
- 1905을사늑약 체결
- 1905May. Koreans arrive in Mexico for the first time.
- 1905June. the Taft–Katsura Agreement- America recognized Korea as Japanese territory and Japanese recognized Philippines as American territory.
- 1905June. 30 merchants establish the Hanseung Chamber of Commerce (한성상무회의소,漢城商務會議所), the first of its kind in Korea. The first president of the association was Kim gi-yeung (김기영,金基永). They also operated the Commerce Monthly (상공월보,商工月報), which was the first business journal.
- 1907Japan–Korea Treaty of 1907
- 1907Hague Secret Emissary Affair
- 1907Battle of Namdaemun
- 1907국채보상운동, 대한제국 고종황제가 강제 퇴위되고 대한제국 순종황제가 즉위, 한국과 일본간에 한·일 신협약 체결, 군대가 해산, 헤이그 특사 파견, 고종 강제퇴위, 신민회 창립
- 1907September – 15 November. The Kyŏngsŏng Exhibition (경성박람회; 京城博覽會) is held in Seoul.
- 1907July. Gojong is forced by Japan to abdicate in favor of his son, Emperor Sunjong.
- 1907July 18. Gojong was forced to abdicate in favour of his son, Sunjong.
- 190823 March. Durham Stevens, an American diplomat and Japanese sympathizer, is assassinated by Korean independence activists.
| - 1906 Meishan earthquake
- September — Empress Dowager Cixi promises to form a constitutional government with no specified date
- 废科举。丙午风灾侵袭广东珠江口一带，肇庆高要的新江云松岭文阁上三层完全倒塌，下二层石额破裂，墙壁崩颓。东莞万顷沙围堤崩溃。ZH
- 1904Russo-Japanese War
- 1904Siege of Port Arthur
- 1904Battle of Liaoyang
- 19041904 Douliu earthquake
- 1905Battle of Mukden
- 1905Batang uprising
- 1905청일만주선후조약
- 1905The prohibition on transfer of property from the Eight Banners to civilians is lifted
- 1905July — The government issues an edict proclaiming the need for leading officials to investigate new ways of government from abroad
- 1905September — Anti-Manchu proponent Wu Yue fails to assassinate the constitutional study commissioners
- 1907April — The territories of Manchuria are reorganized into provinces
- 1907徐錫麟、馬宗漢、秋瑾被捕处死。
- 1907Beipu uprising
- 1907July — Anhui governor Enming is assassinated by the anti-Manchu Xu Xilin
- 1907October — An edict is passed to create a set of codes which apply uniformly to Manchus and Han Chinese
- 1907September — Empress Dowager Cixi declares her intention to create "a bicameral deliberative body"
- 1907September — An edict is passed to disband provincial banner garrisons over a 10-year period
- 1908December — The Guangxu Emperor's young nephew Puyi became emperor of the Qing dynasty.
- 1908November — The Guangxu Emperor died of arsenic poisoning.
- 1908西江水灾，伤亡千余人。
| - No events recorded for this year
- 1904Russo-Japanese War
- 1904February — Russo-Japanese War: Japan launched a surprise torpedo attack on the Imperial Russian Navy at Port Arthur.
- 1905청일만주선후조약
- 1905September — Russo-Japanese War: Japan became the first modern Asian nation to win a war against an Eastern European nation (Russia). The Treaty of Portsmouth was signed, ceding some Russian property and territory to Japan and ending the war. Pro-war activists staged the Hibiya incendiary incident nevertheless. This changed the global world order. Japan became the main Asian power.
- 1908Red Flag Incident
| - Treaty of Portsmouth
- Algeciras Conference
- Susan B. Anthony dies
- Pure Food and Drug Act
- Hepburn Act
- Brownsville affair
- San Francisco earthquake
- 1904Panama Canal Zone acquired
- 1904Louisiana Purchase Exposition
- 1904Roosevelt Corollary to Monroe Doctrine
- 1904인류학의 날
- 1904March 4, 1905 – President Roosevelt begins full term, Fairbanks becomes the 26th vice president
- 1904U.S. presidential election: Theodore Roosevelt elected president for full term; Charles W. Fairbanks elected vice president
- 1905Albert Einstein publishes his theory of relativity
- 1905Industrial Workers of the World
- 1905Niagara Falls conference
- 1907Oklahoma becomes a state
- 1907Gentlemen's Agreement
- 1907Coal mine explodes in Monongah, West Virginia, killing at least 361. Worst industrial accident in American history.
- 1908Federal Bureau of Investigation established
- 1908Ford Model T appears on the market
- 1908Root–Takahira Agreement
- 1908Aldrich–Vreeland Act
- 1908U.S. presidential election: William Howard Taft elected president; James S. Sherman vice president. William Jennings Bryan loses for the third and final time.
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