List of wars involving Japan

This is a list of wars involving Japan.

List

Conflict	Combatant 1	Combatant 2	Results
Jōmon period
East Expedition of Emperor Jimmu (c.7th century BCE)	Kamu-yamato Iware-biko no mikoto's loyal warriors	Troops led by local chiefdoms	Kamu-yamato Iware-biko no mikoto Victory Kamu-yamato Iware-biko no-mikoto became first Emperor(Emperor Jimmu) Foundation of Japan
Yayoi period
Civil war of Wa (2nd century CE)	unknown Yayoi chiefdoms	unknown Yayoi chiefdoms	Establishment of Yamatai state Consolidation of chiefdoms Himiko made queen
Yamato period
Expeditions of Empress Jingū (c.3rd century)	Yamato	Silla	Victory Silla, Baekje, and Goguryeo paid tribute to Yamato. (Kojiki, Nihon Shoki)
Yamato-Goguryeo war (391-404)	Yamato (Wa) Baekje Gaya Ara Gaya	Goguryeo Silla	Defeat The Yamato troops retreated from the capital of Silla, but Ara Gaya captured the capital of Silla again The Yamato troops lost the battle against Goguryeo in Pyongyang (Gwanggaeto Stele)
Jinshin War (675)	Prince Ōama's loyal warriors	Prince Ōtomo's loyal warriors	Prince Ōama victory Death of Prince Ōtomo Emperor Tenmu (Prince Ōama) acceded to the throne.
Nara period
Thirty-Eight Years' War (770-811)	Imperial Court	Emishi	Imperial victory Sakanoue no Tamuramaro became Shogun Death of Aterui. Most of Emishi entered under the rule of Imperial Court
Heian period
Former Nine Years War (1051-1063)	Imperial Court	Abe clan	Imperial victory Rise of Minamoto clan Kiyohara clan ruled Mutsu Province and Dewa Province
Gosannen War (c. 1083-1089)	Minamoto clan Northern Fujiwara clan	Kiyohara clan	Minamoto and Fujiwara victory Northern Fujiwara clan ruled　the former territory of the Kiyohara clan
Genpei War (1180-1185)	Minamoto clan	Taira clan	Minamoto victory Death of Emperor Antoku Establishment of Kamakura shogunate
Kamakura period
Jōkyū War (1221)	22px Kamakura shogunate	Retired Emperor Go-Toba's loyal warriors	Kamakura victory Retired emperors exiled
Mongol invasions of Japan (1274 and 1281)	Japan 22px Kamakura shogunate Imperial Court	Mongol Empire Yuan dynasty Goryeo	Victory The Mongol Empire's invasions fail.
Genkō War (1331–1333)	Emperor Go-Daigo's loyal forces	22px Kamakura shogunate	Imperial victory Rise of the Ashikaga shogunate
Muromachi period
Ōei Invasion (1419)	Tsushima Province	Joseon	Victory Joseon withdrawal
Ōnin War (1467–1477)	Hosokawa clan	Ashikaga Shogunate 22px Yamana clan	Stalemate Weakening of the Ashikaga Shogunate
Azuchi–Momoyama period
Seven Year War (1592–1598)	Japan Toyotomi clan	Joseon Ming dynasty	Inconclusive Tactical stalemate Withdrawal of Japanese armies; Strategic Joseon/Ming dynasty victory
Edo period
Invasion of Ryukyu (1609)	Satsuma Domain	Ryukyu Kingdom	Satsuma victory Ryukyu Kingdom becomes a vassal state.
Shimabara Rebellion (1637-1638)	Tokugawa shogunate Dutch Empire	Christian peasant and ronin rebels	Tokugawa victory National seclusion policy imposed Christianity driven underground
Bombardment of Kagoshima (1863)	Satsuma Domain	British Empire	Stalemate Tactical stalemate and mitigated British victory
Shimonoseki Campaign (1863–1864)	Chōshū Domain	British Empire Dutch Empire French Empire United States of America	Defeat Chōshū pays an indemnity of $3,000,000.
Summer War (1866)	Chōshū Domain	Tokugawa shogunate 22px Aizu Domain	Chōshū victory Weakening of the Tokugawa shogunate
Meiji period
Boshin War (1868–1869)	Imperial Court Tozama: Satchō Alliance Satsuma Domain Chōshū Domain Other Tozama daimyo: Tosa Domain Hiroshima Domain Tsu Domain Saga Domain Ogaki Domain Hirosaki Domain Kuroishi Domain Yodo Domain Empire of Japan British Empire	Tokugawa Shogunate Aizu Domain Ōuetsu Reppan Dōmei Jozai Domain Nagaoka Domain Sendai Domain and others... Takamatsu Domain Tsuruoka Domain Kuwana Domain Matsuyama Domain Ogaki Domain Republic of Ezo French Empire	Imperial victory End of the Tokugawa shogunate Meiji Restoration
Southwestern War (1877)	Empire of Japan	Shizoku clans from Satsuma Domain	Victory Shizoku rebellions were suppressed The conscription system was established in Japan
First Sino-Japanese War (1894–1895)	Empire of Japan	Qing Dynasty	Victory
Japanese invasion of Taiwan (1895)	Empire of Japan	Republic of Formosa	Victory Annexation of Formosa
Boxer Rebellion (1899–1901)	Empire of Japan Russian Empire British Empire French Republic United States of America German Empire Austro-Hungarian Empire Kingdom of Italy	Qing dynasty	Victory The rebellion was suppressed. Signing of the Boxer Protocol Provisions for foreign troops to be stationed in Beijing
Russo-Japanese War (1904–1905)	Empire of Japan	Russian Empire Principality of Montenegro(Diplomatic)	Victory Treaty of Portsmouth
Taishō period
World War I (1914–1918)	Empire of Japan French Republic British Empire Russian Empire Kingdom of Italy United States of America Kingdom of Serbia Montenegro Republic of China Kingdom of Belgium Kingdom of Greece Kingdom of Romania Portuguese Republic Siam Kingdom of Hejaz Emirate of Nejd and Hasa 22px Idrisid Emirate of Asir Nepal United States of Brazil Transcaucasian Democratic Federative Republic Democratic Republic of Armenia Monaco Cuba Panama Guatemala Nicaragua Costa Rica Haiti Honduras Liberia	German Empire Austro-Hungarian Empire Ottoman Empire Kingdom of Bulgaria Dervish State 22px Sultanate of Darfur South African Republic	Victory End of the German Empire, Austro-Hungarian Empire, Ottoman Empire, and Russian Empire Formation of new countries in Europe and the Middle East Transfer of German colonies and regions of the former Ottoman Empire to other powers Creation of the League of Nations
Siberian Intervention (1918–1922)	Empire of Japan United States of America British Empire French Republic Kingdom of Italy Republic of Poland Republic of China Czechoslovak Republic Mongolia White movement	Russian Soviet Federative Socialist Republic Far Eastern Republic Mongolian People's Party	Withdrawal Bolsheviks regain Siberia
Shōwa period
Japanese invasion of Manchuria (1931–1932)	Empire of Japan	Republic of China	Victory Tanggu Truce Establishment of the Japanese puppet state Manchukuo
Second Sino-Japanese War (1937–1941)	Empire of Japan	Republic of China	Merged into World War II Chinese victory as part of the Allied victory in the Pacific War Surrender of all Japanese forces in mainland China (excluding Manchuria), Formosa and French Indochina north of 16° north to the Republic of China China becomes a permanent member of the United Nations Security Council Resumption of Chinese Civil War
Invasion of French Indochina (1940)	Empire of Japan	Vichy France French Indochina	Victory Japanese occupation of Northern French Indochina
World War II (1941–1945)	Empire of Japan German Reich Kingdom of Italy Kingdom of Thailand Republic of Finland Kingdom of Hungary Kingdom of Romania Kingdom of Bulgaria Slovak Republic Independent State of Croatia Kingdom of Iraq	Republic of China United States of America British Empire Union of Soviet Socialist Republics French Republic Viet Minh Republic of Poland Democratic Federal Yugoslavia Kingdom of Greece Kingdom of Denmark Kingdom of Norway Netherlands Kingdom of Belgium Grand Duchy of Luxembourg Czechoslovak Republic United States of Brazil United Mexican States Colombia Cuba Ethiopian Empire	Defeat Fall of the Empire of Japan, German Reich, and Kingdom of Italy Allied occupation of Japan and Germany Continuation of Chinese Civil War Substantial weakening of European colonial powers, gradual decolonization of Asia (including the Indonesian National Revolution and the First Indochina War) Creation of the United Nations Emergence of the United States of America and the Union of Soviet Socialist Republics as superpowers Beginning of the Cold War
Operation Masterdom (1945–1946)	Empire of Japan British Empire French Republic	Viet Minh	Withdrawal Start of the First Indochina War, lasting until the Geneva Conference of 1954
Heisei period
Iraq War (2003–2011)	Coalition forces Japan South Korea Spain Denmark Romania El Salvador Estonia Bulgaria Moldova Albania Ukraine Czech Republic Tonga Azerbaijan Singapore Bosnia and Herzegovina Macedonia Latvia Kazakhstan Armenia Mongolia Georgia Slovakia Lithuania Italy Norway Hungary Netherlands Portugal New Zealand Thailand Philippines Honduras Dominican Republic Nicaragua Iceland United States United Kingdom Australia Poland Peshmerga New Iraqi government	Iraqi Regional Branch Supreme Command for Jihad and Liberation Army of the Men of the Naqshbandi Order Sunni insurgents Islamic State of Iraq 25px Islamic Army of Iraq Ansar al-Sunnah Shia insurgents Mahdi Army Special Groups Asa'ib Ahl al-Haq Others Ba'athist Iraq	Victory Invasion and occupation of the Republic of Iraq Defeat of Ba'ath Party government and execution of Saddam Hussein Iraqi insurgency, emergence of al-Qaeda in Iraq, and civil war Subsequent depletion of Iraqi insurgency, improvements in public security Establishment of democratic elections and formation of new Shia led government U.S.–Iraq Status of Forces Agreement Withdrawal of U.S. troops from the Republic of Iraq Rise of Iraqi insurgency after U.S. withdrawal and spillover with Syrian Civil War Resurgence of al-Qaeda in Iraq and Syria
Operation Ocean Shield (2009–present)	Japan Somalia NATO Australia China Colombia India Indonesia Malaysia New Zealand Oman Pakistan Puntland Russia Saudi Arabia Seychelles Singapore South Korea Ukraine	Somali Pirates	Ongoing NATO operations being conducted.

See also

• List of Japanese battles