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The 1923 Great Kantō earthquake (, or ) was a major
earthquake An earthquakealso called a quake, tremor, or tembloris the shaking of the Earth's surface resulting from a sudden release of energy in the lithosphere that creates seismic waves. Earthquakes can range in intensity, from those so weak they ...
that struck the
Kantō Plain The , in the Kantō region of central Honshu, is the largest plain in Japan. Its 17,000 km2 covers more than half of the region extending over Tokyo, Saitama Prefecture, Kanagawa Prefecture, Chiba Prefecture, Gunma Prefecture, Tochigi Prefe ...
on the main Japanese island of
Honshu , historically known as , is the largest of the four main islands of Japan. It lies between the Pacific Ocean (east) and the Sea of Japan (west). It is the list of islands by area, seventh-largest island in the world, and the list of islands by ...
at 11:58:32 JST (02:58:32 UTC) on Saturday, 1 September 1923. It had an approximate magnitude of 8.0 on the
moment magnitude scale The moment magnitude scale (MMS; denoted explicitly with or Mwg, and generally implied with use of a single M for magnitude) is a measure of an earthquake's magnitude ("size" or strength) based on its seismic moment. was defined in a 1979 paper ...
(Mw), with its epicenter located southwest of the capital
Tokyo Tokyo, officially the Tokyo Metropolis, is the capital of Japan, capital and List of cities in Japan, most populous city in Japan. With a population of over 14 million in the city proper in 2023, it is List of largest cities, one of the most ...
. The earthquake devastated Tokyo, the port city of
Yokohama is the List of cities in Japan, second-largest city in Japan by population as well as by area, and the country's most populous Municipalities of Japan, municipality. It is the capital and most populous city in Kanagawa Prefecture, with a popu ...
, and surrounding prefectures of
Kanagawa is a Prefectures of Japan, prefecture of Japan located in the Kantō region of Honshu. Kanagawa Prefecture is the List of Japanese prefectures by population, second-most populous prefecture of Japan at 9,221,129 (1 April 2022) and third-dens ...
, Chiba, and Shizuoka, and caused widespread damage throughout the
Kantō region The is a geography, geographical region of Honshu, the largest island of Japan. In a common definition, the region includes the Greater Tokyo Area and encompasses seven prefectures of Japan, prefectures: Chiba Prefecture, Chiba, Gunma Prefe ...
. Fires, exacerbated by strong winds from a nearby
typhoon A typhoon is a tropical cyclone that develops between 180° and 100°E in the Northern Hemisphere and which produces sustained hurricane-force winds of at least . This region is referred to as the Northwestern Pacific Basin, accounting for a ...
, spread rapidly through the densely populated urban areas, accounting for the majority of the devastation and casualties. The death toll is estimated to have been between 105,000 and 142,000 people, including tens of thousands who went missing and were presumed dead. Over half of Tokyo and nearly all of Yokohama were destroyed, leaving approximately 2.5 million people homeless. The disaster triggered widespread social unrest, including the Kantō Massacre, in which ethnic Koreans and others mistaken for them were murdered by vigilante groups based on false rumors. In the aftermath, the Japanese government declared
martial law Martial law is the replacement of civilian government by military rule and the suspension of civilian legal processes for military powers. Martial law can continue for a specified amount of time, or indefinitely, and standard civil liberties ...
and undertook extensive relief and restoration efforts. The earthquake prompted ambitious plans for the reconstruction of Tokyo, aiming to create a modern, resilient imperial capital. However, these plans were often met with political contestation, financial constraints, and local resistance, leading to a reconstruction that, while significantly improving infrastructure, fell short of the grandest visions. The disaster also fueled debates about national identity, modernity, and societal values, with many commentators interpreting the event as a divine punishment for perceived moral decline and advocating for spiritual and social regeneration. The Great Kantō earthquake remains a pivotal event in modern Japanese history, profoundly impacting urban planning, disaster preparedness, and social consciousness. 1 September is commemorated annually in Japan as Disaster Prevention Day.


Earthquake and immediate impact

The
Kantō region The is a geography, geographical region of Honshu, the largest island of Japan. In a common definition, the region includes the Greater Tokyo Area and encompasses seven prefectures of Japan, prefectures: Chiba Prefecture, Chiba, Gunma Prefe ...
of eastern
Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...
is prone to major earthquakes due to its location near complex
tectonic plate Plate tectonics (, ) is the scientific theory that the Earth's lithosphere comprises a number of large tectonic plates, which have been slowly moving since 3–4 billion years ago. The model builds on the concept of , an idea developed durin ...
boundaries. The 1923 earthquake occurred when the
Philippine Sea Plate The Philippine Sea plate or the Philippine plate is a tectonic plate comprising oceanic lithosphere that lies beneath the Philippine Sea, to the east of the Philippines. Most segments of the Philippines, including northern Luzon, are part of ...
subducted beneath the Okhotsk Plate (sometimes considered part of the North American Plate) along the Sagami Trough in Sagami Bay. The earthquake's epicenter was located approximately southwest of
Tokyo Tokyo, officially the Tokyo Metropolis, is the capital of Japan, capital and List of cities in Japan, most populous city in Japan. With a population of over 14 million in the city proper in 2023, it is List of largest cities, one of the most ...
. The initial shock, occurring at 11:58:32 JST on 1 September 1923, consisted of two long periods of horizontal shaking punctuated by massive vertical thrusts. This was followed by a second intense wave minutes later. Over the next ten days, the region experienced 1,197 aftershocks strong enough to be felt by humans. The earthquake immediately toppled structures, crushed people, and caused widespread panic. Survivor accounts describe an initial period of stunned silence followed by a frantic rush as people tried to reunite with family and salvage belongings. Engineer Mononobe Nagao recalled the earth shaking "back and forth for what seemed like 15 seconds", followed by violent vertical convulsions that knocked people to the ground. Writer Tanaka Kōtarō described the sound as akin to a giant "blackening whirlwind" churning up the earth from "deep underground".


Fires and pandemonium

Within thirty minutes of the first tremor, more than 130 major fires broke out across Tokyo, particularly in the densely populated eastern and northeastern sections. These fires were fueled by overturned charcoal braziers used for midday meals, leaking gas from ruptured lines, and flammable debris from collapsed wooden buildings. Strong winds, associated with a
typhoon A typhoon is a tropical cyclone that develops between 180° and 100°E in the Northern Hemisphere and which produces sustained hurricane-force winds of at least . This region is referred to as the Northwestern Pacific Basin, accounting for a ...
passing off the coast, fanned the flames, creating massive firestorms that swept through the city. The air temperature in some areas reached . The combination of ongoing aftershocks and rapidly spreading fires led to pandemonium. Millions of residents attempted to flee, often carrying their possessions, which clogged the already damaged streets and bridges. Kawatake Shigetoshi described being trapped in a "wave of people" in eastern Tokyo, unable to move as fires approached from multiple directions. Many sought refuge in open spaces, such as parks and the grounds surrounding the Imperial Palace, but these areas quickly became overcrowded. Waterways like the Sumida River also became congested with boats as people tried to escape by water, only to face sparks and burning debris falling from the sky. The disaster rapidly overwhelmed Tokyo's infrastructure and its capacity for an orderly evacuation.


Damage and devastation

The Great Kantō earthquake was one of the most destructive
natural disasters A natural disaster is the very harmful impact on a society or community brought by natural phenomenon or Hazard#Natural hazard, hazard. Some examples of natural hazards include avalanches, droughts, earthquakes, floods, heat waves, landslides ...
of the 20th century. Roughly half of Tokyo and virtually all of Yokohama were transformed into "blackened, corpse-strewn wastelands". The earthquake and subsequent fires destroyed an estimated 397,119 homes in Tokyo Prefecture alone, leaving about 1.38 million people homeless in
Tokyo City was a Cities of Japan, municipality in Japan and capital of Tokyo Prefecture (1868–1943), Tokyo Prefecture (or ''Tokyo-fu'') which existed from 1 May 1889 until the establishment of Tokyo Metropolis on 1 July 1943. The historical boundari ...
. Across the seven affected prefectures (Tokyo,
Kanagawa is a Prefectures of Japan, prefecture of Japan located in the Kantō region of Honshu. Kanagawa Prefecture is the List of Japanese prefectures by population, second-most populous prefecture of Japan at 9,221,129 (1 April 2022) and third-dens ...
, Chiba, Saitama, Shizuoka, Yamanashi, and Ibaraki), a total of 2.5 million people were displaced. The physical destruction was immense. In addition to buildings, the earthquake buckled roads, collapsed bridges (362 destroyed and 70 heavily damaged in Tokyo), twisted train tracks, snapped water and sewer pipes, and severed telegraph lines. Tokyo's main aqueduct from Wadabori collapsed in two places and required extensive repairs. The sea floor in Sagami Bay dropped by over at the epicenter, triggering
tsunamis A tsunami ( ; from , ) is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions and underwater explosions (including detonations, la ...
that inundated low-lying coastal communities. Fires were the primary cause of destruction. In Tokyo, districts like Asakusa, Kanda, Nihonbashi, Kyōbashi, Honjo, and Fukagawa were largely incinerated. The Honjo Clothing Depot, a large open area where over 30,000 people sought refuge, became a death trap when a massive firestorm (a or whirlwind of fire) engulfed it, killing nearly everyone inside. Survivor Koizumi Tomi described the site as "hell on earth", surrounded by "endless rows of bodies: red, inflamed bodies; black, swollen bodies; bodies partially buried under ash and smoldering remains". Governmental administration was crippled. The vast majority of police stations and municipal and ward offices crumbled or burned. Out of Tokyo's 196 primary schools, 117 were destroyed, along with numerous higher girls' schools, trade schools, colleges, and universities. Social welfare facilities, including public dining halls, cheap lodging homes, and crèches, were annihilated. Over 160 public and private hospitals in Tokyo were destroyed. The economic impact was also severe. Roughly 7,000 factories were destroyed, including major spinning, dyeing, and tool manufacturing plants. Financial institutions suffered heavily, with 121 of 138 bank head offices and 222 of 310 branch offices in Tokyo City consumed by fire or reduced to rubble. Insurance policies offered little relief, as most contained clauses exempting companies from earthquake-related damage; eventually, the government intervened to facilitate partial payouts. The disaster also led to significant unemployment. In September 1923, the unemployment rate in the wards of Tokyo reached 45% (59% for men, 28% for women). By 15 November, across Tokyo Prefecture, 178,887 people were registered as unemployed, with the commerce and industry sectors most affected.


Casualties

The human toll of the Great Kantō earthquake was catastrophic. Estimates of the death toll vary, but a commonly cited figure is around 105,000 deaths, with some estimates reaching 142,000 when including those missing and presumed dead. In Tokyo City alone, official figures listed 58,104 killed, 10,556 missing, 7,876 seriously injured, and 18,932 slightly injured. The ward of Honjo suffered the highest number of fatalities, with 48,393 killed, largely due to the firestorm at the Honjo Clothing Depot. People died in numerous ways: crushed by collapsing buildings, trampled in panicked crowds, burned alive in the fires, or drowned in rivers and canals while attempting to escape the flames. Some victims suffocated as fires consumed oxygen, while others were boiled alive in ponds offering no protection from the intense heat. The smell of burning human flesh and decaying bodies permeated the air for weeks. Disposing of the dead became a major public health concern, leading to mass cremations, particularly at the Honjo Clothing Depot.


Social unrest and breakdown of order

In the immediate aftermath of the earthquake, law and order broke down in many parts of the affected region. This period was characterized by the spread of rumors, the formation of vigilante groups (), and, most tragically, the massacre of ethnic Koreans and others mistaken for them.


Rumors and misinformation

Widespread destruction of communication infrastructure contributed to an atmosphere of uncertainty and fear. Rumors spread rapidly, often relayed by refugees fleeing the disaster zone. Some stories suggested that
Mount Fuji is an active stratovolcano located on the Japanese island of Honshu, with a summit elevation of . It is the highest mountain in Japan, the second-highest volcano on any Asian island (after Mount Kerinci on the Indonesian island of Sumatra), a ...
had erupted or that a large tsunami had washed away Yokohama. The most damaging rumors, however, concerned alleged activities by Koreans. False reports circulated that Koreans were poisoning wells, committing arson, looting, and organizing attacks on Japanese. These rumors were given a degree of legitimacy when some government officials, including Gotō Fumio of the
Home Ministry An interior ministry or ministry of the interior (also called ministry of home affairs or ministry of internal affairs) is a Ministry (government department), government department that is responsible for domestic policy, public security and law e ...
, broadcast messages warning of "organized groups of Korean extremists" attempting to "commit acts of
sedition Sedition is overt conduct, such as speech or organization, that tends toward rebellion against the established order. Sedition often includes subversion of a constitution and incitement of discontent toward, or insurrection against, establ ...
".


Massacre of Koreans by vigilante groups

Fueled by these rumors and a climate of fear and
xenophobia Xenophobia (from (), 'strange, foreign, or alien', and (), 'fear') is the fear or dislike of anything that is perceived as being foreign or strange. It is an expression that is based on the perception that a conflict exists between an in-gr ...
, Japanese vigilante groups, known as , formed across the Kantō region. By mid-September, an estimated 3,689 such groups were operating, ostensibly to prevent fires, stop looting, and maintain order. However, many of these groups, often armed with makeshift weapons like clubs, swords, and bamboo spears, targeted Koreans and, in some cases, Chinese,
Okinawans The are a Japonic languages, Japonic-speaking East Asian people, East Asian ethnic group indigenous to the Ryukyu Islands, which stretch from the island of Kyushu to the island of Taiwanese islands, Taiwan. With Japan, most Ryukyuans live in t ...
, and Japanese from certain regions who were mistaken for Koreans due to their accents. An estimated 6,000 Koreans were murdered in what became known as the Kantō Massacre. Victims were often subjected to brutal violence, including beatings, stabbings, and lynchings, sometimes after being "tested" for their Korean identity (e.g., by being asked to pronounce Japanese words that were difficult for Koreans). While some police and military personnel attempted to protect Koreans, others were complicit in the violence or turned a blind eye. Despite the scale of the massacres, few perpetrators were prosecuted; of 125 vigilante group members tried, only 32 received formal sentences, and 91 received suspended sentences. Contemporary commentators like Hoashi Ri'ichirō and Oku Hidesaburō condemned the massacres as "extremely disgusting and internationally shameful" and a "disgraceful act that exposed a moral flaw".


Cabinet response and martial law

The earthquake struck at a time of political uncertainty in Japan. Prime Minister Katō Tomosaburō had died on 24 August, and Admiral Yamamoto Gonnohyōe, selected to form a new cabinet, had made little progress when the disaster occurred. This elite-level political vacuum contributed to confusion over who had the authority to deploy police and military personnel. General Ishimitsu Maomi, deputy commander of the Imperial Guard Forces, acted first, deploying troops to protect imperial locations. Akaike Atsushi, inspector general of the Tokyo Metropolitan Police, faced an overwhelming task with outnumbered and unprepared forces. The new cabinet was formally appointed on the afternoon of 2 September, sworn in on the lawn of the Akasaka Detached Palace amid falling ash, as other ministerial buildings were deemed unsafe. One of the first decisions of the new cabinet was to declare
martial law Martial law is the replacement of civilian government by military rule and the suspension of civilian legal processes for military powers. Martial law can continue for a specified amount of time, or indefinitely, and standard civil liberties ...
over what remained of the capital on 2 September. This ushered in the largest peacetime domestic mobilization and deployment of the army in Japan's pre–
World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
history, with eventually over 52,000 troops deployed to Tokyo and Yokohama. The martial law headquarters was granted extensive powers, including administering relief and public safety, prosecuting lawbreakers, prohibiting public gatherings, censoring information, stopping and searching individuals, and entering private homes. Martial law remained in effect until 15 November. Initial military deployment was fraught with difficulties. Commanders arriving in Tokyo found a near total absence of reliable information and lines of communication were non-existent. The military had to rely on
aerial reconnaissance Aerial reconnaissance is reconnaissance for a military or Strategy, strategic purpose that is conducted using reconnaissance aircraft. The role of reconnaissance can fulfil a variety of requirements including Artillery observer, artillery spott ...
and around 2,000 army-trained carrier pigeons for communication. The zone of martial law was progressively expanded to cover all of Tokyo and Kanagawa Prefectures by 3 September, and Chiba and Saitama Prefectures by 4 September. To counter rumors and vigilante violence, particularly against Koreans, military authorities were empowered to arrest individuals, disband suspicious groups, and confiscate weapons. From 4 September, military and police began to collect and transport Koreans to government-run detention centers for "protective custody"; by the end of September, 23,715 Koreans had been taken into these centers.


Relief efforts

The Yamamoto cabinet created the Emergency Earthquake Relief Bureau (''Rinji shinsai kyūgo jimukyoku'') to oversee all relief and recovery efforts.


Medical aid

Providing emergency medical assistance was an immediate priority, but initial efforts were largely unsuccessful. Many organized rescue and first aid squads were unable to reach the worst-hit areas like Honjo, Asakusa, and Kanda until 4 or 5 September due to destroyed infrastructure and unofficial checkpoints by vigilante groups. A dearth of medical supplies, due to the destruction of numerous hospitals and dispensaries, further hampered efforts. The Relief Bureau concentrated its limited medical resources at large open areas like
Hibiya Park Hibiya Park (, ) is a park in Chiyoda, Tokyo, Japan. It covers an area of 161,636.66 m2 (40 acres) between the east gardens of the Kōkyo, Imperial Palace to the north, the Shinbashi district to the southeast and the Kasumigaseki government distri ...
and
Ueno Park is a spacious public park in the Ueno, Tokyo, Ueno district of Taitō, Tokyo, Japan. The park was established in 1873 on lands formerly belonging to the Buddhist temples in Japan, temple of Kan'ei-ji. Amongst the country's first public parks, i ...
, where tens of thousands of refugees had congregated. Over the longer term, mobile clinics and dispensaries proved most effective. The Relief Bureau created 41 units, and other organizations like Tokyo Prefecture, the Japan Red Cross Society, and the
Mitsubishi Corporation is a Japanese general trading company ( ''sogo shosha'') and a core member of the Mitsubishi Group. For much of the post-war period, Mitsubishi Corporation has been the largest of the five great ''sogo shosha'' (Mitsubishi, Mitsui, Itochu, S ...
also operated mobile clinics. By 30 November, these public and private clinics had provided care to 447,111 sufferers. Temporary hospitals, some in tents donated by American and French governments, accommodated over 6,000 seriously wounded people.


Food and water

Securing food and water was a critical challenge. Mayor Hidejirō Nagata learned on 2 September that the army's main supply depot in Fukagawa, holding 8,000 ''
koku The is a Chinese-based Japanese unit of volume. One koku is equivalent to 10 or approximately , or about of rice. It converts, in turn, to 100 shō and 1,000 gō. One ''gō'' is the traditional volume of a single serving of rice (before co ...
'' of rice (enough to feed over 500,000 people for six days), had been completely destroyed by fire. The military managed to amass over 120,000 combat rations and 60,000 rations of rice from other stores. By 4 September, military units were distributing dried noodles. Eventually, 74,048 ''koku'' of rice were transported from military installations across Japan to distribution centers in Tokyo and Yokohama. The government also appealed to prefectural governors for rice donations, receiving pledges of 61,490 ''koku'' in the first week. An "Emergency Requisition Ordinance" allowed the government to requisition foodstuffs and other materials. Transporting these supplies was a major logistical challenge due to damaged rail lines and docks. Navy personnel spent a week repairing 86 piers at
Shibaura is a district of Minato, Tokyo, Minato ward located in Tokyo, Japan. The district is located between the eastern side of the Yamanote Line train and Tokyo Bay. Shibaura consists mostly of artificial islands created by the excavation of indust ...
and Ryōgoku, while army forces cleared railway lines and rebuilt track. Conservative estimates suggest that 1.25 million people received rice distributions between 6 and 10 September. Water supply was an even more significant problem. Tokyo's main water plant was not heavily damaged, but pipes and aquifers were severed in over two hundred locations. Warships tanked water from
Yokosuka is a city in Kanagawa Prefecture, Japan. , the city has a population of 373,797, and a population density of . The total area is . Yokosuka is the 11th-most populous city in the Greater Tokyo Area, and the 12th in the Kantō region. The city i ...
,
Osaka is a Cities designated by government ordinance of Japan, designated city in the Kansai region of Honshu in Japan. It is the capital of and most populous city in Osaka Prefecture, and the List of cities in Japan, third-most populous city in J ...
, and
Nagoya is the largest city in the Chūbu region of Japan. It is the list of cities in Japan, fourth-most populous city in Japan, with a population of 2.3million in 2020, and the principal city of the Chūkyō metropolitan area, which is the List of ...
, and the army requisitioned water barrels to transport clean water. By the end of December, nearly 40 million gallons (151 million liters) of drinking water had been transported.


Relocation and shelter

Shelter options were bleak for Tokyo Prefecture's 1.55 million homeless. Nearly 800,000 people left Tokyo or Yokohama, first on foot and later via restricted rail service (from 11 September), to stay with relatives or friends elsewhere. About 250,000 people dispersed to other parts of Japan, including 17,704 to
Kobe Kobe ( ; , ), officially , is the capital city of Hyōgo Prefecture, Japan. With a population of around 1.5 million, Kobe is Japan's List of Japanese cities by population, seventh-largest city and the third-largest port city after Port of Toky ...
, 7,600 to Hokkaidō, and some even to Japan's colonies like
Taiwan Taiwan, officially the Republic of China (ROC), is a country in East Asia. The main geography of Taiwan, island of Taiwan, also known as ''Formosa'', lies between the East China Sea, East and South China Seas in the northwestern Pacific Ocea ...
and Karafuto. Those remaining in Tokyo flooded large open spaces such as Hibiya Park, Ueno Park, and the Imperial Palace grounds. On 9 September, municipal authorities began constructing temporary barracks. The Meiji Shrine site housed nearly 6,000 refugees, Ueno Park over 9,500, and Hibiya Park 7,000. Many of these open spaces became shantytowns. Barracks were often cramped, with an average of 0.6 '' tsubo'' (about ) of floor space per person. Sanitation was a major problem, with makeshift latrines overflowing. While a modest number of refugees left barrack housing by the end of 1923, many more returned to the disaster zone and erected private makeshift shacks. By October 1923, 539,450 people were living in 111,791 such temporary abodes.


Interpretations and social impact


Disaster as a national tragedy

Government officials and media outlets made concerted efforts to construct the Great Kantō earthquake as an unprecedented national calamity, requiring a unified national response. Newspapers, the chief medium for disseminating news, played a lead role. Major papers like the '' Tokyo Nichi Nichi Shinbun'', '' Osaka Asahi Shinbun'', and '' Osaka Mainichi Shinbun'' used emotive headlines, harrowing survivor accounts, vivid photographs, and even documentary motion pictures to convey the disaster's horror and scale to a national audience. These portrayals often framed the disaster in terms of wartime analogies, emphasizing themes of sacrifice and national unity. The forty-ninth-day memorial service held on 19 October 1923, at the site of the Honjo Clothing Depot, attended by over 200,000 people and leading politicians, was a meticulously choreographed event. Speeches by figures like Gizō Kasuya and Shōzaburō Horie explicitly linked the victims' sacrifices to the future reconstruction of Tokyo and Japan, urging national unity and effort. Visual culture, including lithographic prints and
postcards A postcard or post card is a piece of thick paper or thin Card stock, cardboard, typically rectangular, intended for writing and mailing without an envelope. Non-rectangular shapes may also be used but are rare. In some places, one can send a ...
, also played a significant role in disseminating the image of a devastated but resilient capital, and of a concerned government responding to the crisis. Postcards depicting dead bodies, while sometimes classified as contraband, were widespread and brought the human cost of the disaster to a national audience in a stark manner.


Divine punishment and moral admonishment

A widespread interpretation, embraced by numerous elites across various sectors of society, was that the earthquake was an act of divine punishment (''tenken'' or ''tenbatsu'') or heavenly warning. This view was not confined to religious leaders but was articulated by bureaucrats, politicians, academics, and social commentators. The disaster was seen as a response to Japan's perceived moral decline, materialism, luxury-mindedness, hedonism, and excessive individualism that had become prominent since
World War I World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...
. The entertainment districts of Tokyo, such as Asakusa, and centers of consumer spending, like the Ginza, were often singled out as epicenters of this perceived degeneracy and thus seen as specifically targeted by the heavens. The destruction of icons of modern consumerism, such as the
Mitsukoshi is an international Department stores in Japan, department store chain with headquarters in Tokyo, Japan. Its holding company, Isetan Mitsukoshi Holdings, is a member of the Mitsui, Mitsui Group. History It was founded in 1673 with the (sho ...
Department Store and the twelve-story Ryōunkaku tower in Asakusa, was imbued with symbolic meaning. This interpretation served as a cosmological bolster for critiques of contemporary society and legitimated calls for social, moral, and ideological reform. The earthquake was thus framed as a moral wake-up call, placing Japan at a crossroads between decline and renovation.


Spiritual renewal and fiscal retrenchment

The interpretation of the earthquake as divine admonishment fueled calls for national spiritual renewal (''seishin fukkō'') and economic moderation. An Imperial Rescript Regarding the Invigoration of the National Spirit, issued on 10 November 1923, became a foundational document for this movement. It urged Japanese people to reject frivolousness, extravagance, and extreme tendencies, and to embrace simplicity, sincerity, fortitude, diligence, thrift, moderation, loyalty, and
filial piety Filial piety is the virtue of exhibiting love and respect for one's parents, elders, and ancestors, particularly within the context of Confucian ethics, Confucian, Chinese Buddhism, Chinese Buddhist ethics, Buddhist, and Daoism, Daoist ethics. ...
. Government campaigns, such as the 1924 Campaign for the Encouragement of Diligence and Thrift (''Kinken shōrei undō''), employed the memory of the earthquake to promote austerity and national savings. Policies like the 1924 luxury tariff, which placed a 100 percent duty on a wide range of imported goods deemed luxuries, aimed to curb consumer spending and foster economic self-discipline. While these measures had mixed results in altering consumer behavior in the long term, they reflected a broader elite concern with reorienting Japanese society towards more traditional and disciplined values. The push for spiritual renewal also involved using schools, neighborhood associations, and new media like film and radio to inculcate desired moral values.


Reconstruction


Visions for a new capital

The devastation of Tokyo unleashed a wave of optimism among many bureaucrats, urban planners, and social reformers, who saw an unparalleled opportunity to rebuild the city as a modern, rational, and resilient metropolis. Figures like Gotō Shinpei, Abe Isoo, and Fukuda Tokuzō argued that "old Tokyo" had been a breeding ground for social ills due to overcrowding, poor sanitation, poverty, and inadequate infrastructure. The earthquake, they believed, created a chance to rectify these problems and construct a capital that would reflect new social values and assist the state in managing its subjects. Many visions for the new Tokyo were influenced by "authoritarian high modernism," emphasizing state-led planning, technical and scientific progress, and intervention in many aspects of human life, from public health and housing to urban layout and transportation. Plans called for wider, paved streets, extensive green belts and parks, modern public housing, new sanitation systems, and improved transportation networks. Some, like Gotō Shinpei, envisioned a grand imperial capital that would project Japan's emerging power and prestige on the international stage.


Political contestation and planning

Despite the initial optimism, reconstruction planning was fraught with political contestation. Gotō Shinpei, as Home Minister and head of the Reconstruction Institute (''Teito fukkōin''), championed ambitious and expensive plans, initially proposing a budget of nearly ¥4.5 billion for the complete purchase and replanning of burned-out areas of Tokyo. This was met with immediate opposition from Finance Minister Inoue Junnosuke and other cabinet colleagues, who were concerned about the nation's financial stability and favored a more fiscally conservative approach. Debates raged over the scope of reconstruction, the extent of land readjustment, the design of new infrastructure, and, crucially, the budget. The Imperial Capital Reconstruction Deliberative Council (''Teito fukkō shingikai''), an advisory body of elder statesmen and party leaders, further scaled back the government's already reduced proposals, leading to a final national reconstruction budget of ¥468 million approved by the Diet in December 1923, a far cry from Gotō's initial vision. The political infighting exposed deep divisions within Japan's elite and the structural weaknesses of its quasi-democratic, bureaucratic-oligarchic political system.


Land readjustment

A key component of the physical reconstruction was land readjustment (''kukaku seiri''). The Special Urban Planning Law of December 1923 empowered the government to rationalize irregular land plots, widen streets, and create public spaces by confiscating up to 10 percent of private land without monetary compensation. Roughly of land in Tokyo were divided into 66 readjustment districts. While the process aimed to create a more rational and user-friendly urban environment, it was met with confusion, resistance, and numerous petitions from landowners and tenants. Concerns involved the constitutionality of uncompensated land confiscation, the impact on businesses, the rights of tenants, and the adequacy of compensation for relocated structures. Despite these local-level disputes, the program resulted in the rationalization of many neighborhoods, particularly in eastern Tokyo, and the creation of significant new public land for roads and other infrastructure. Overall, about 15 percent of residential land in city-managed readjustment areas was converted to public use.


Achievements and shortcomings

By the time reconstruction was officially celebrated in March 1930, Tokyo had undergone significant physical changes. The most notable successes were in transportation infrastructure. The total area of roads in Tokyo increased by 45 percent, and many were widened and paved, with modern sidewalks. Key arterial roads like Shōwa-dōri were constructed, and new, modern bridges, such as the Eitai-bashi and Kiyosu-bashi spanning the Sumida River, became icons of the new city. The river and canal system was also improved. However, many of the more ambitious social and environmental goals were not fully realized. Spending on parks and green spaces was limited; by 1930, parks constituted only 3.7 percent of Tokyo's urban space, a marginal increase from the 1.7 percent in 1922. Social welfare facilities, while improved, also received a small fraction of the reconstruction budget. Many of the pre-earthquake urban vulnerabilities and social problems, including slum areas, persisted or re-emerged. The final reconstruction expenditure by national and city governments totaled roughly ¥744 million.


Earthquake Memorial Hall

The site of the Honjo Clothing Depot, where tens of thousands perished, became a focal point for mourning and remembrance. Plans for a memorial were initiated soon after the disaster. In June 1924, the Taishō Earthquake Disaster Memorial Project Association was formed to oversee the project. A national design competition for the memorial complex was launched in December 1924. The winning entry by engineer-architect Maeda Kenjirō, a tower, proved controversial due to its perceived resemblance to a Prussian triumphal tower and its perceived insensitivity to Buddhist sensibilities. After sustained protest, particularly from Buddhist federations, the design was scrapped in December 1926. Engineer Itō Chūta was then appointed to create a new, more "Japanese" design, heavily influenced by Buddhist architecture, featuring a pagoda that would house a charnel house. The Earthquake Memorial Hall (later the Tokyo Metropolitan Memorial Hall) in Yokoamichō Park was completed on 1 September 1930.


Legacy

The Great Kantō earthquake left an indelible mark on Japan. 1 September was designated as Disaster Prevention Day (防災の日, ''Bōsai no hi'') in 1960, an annual commemoration involving nationwide disaster drills and awareness campaigns. The disaster highlighted urban vulnerabilities and influenced subsequent approaches to city planning and building codes, although the ideal of a truly disaster-proof city remained elusive. The memory of the earthquake, particularly the firestorms and the Honjo Clothing Depot tragedy, continued to haunt Tokyoites, influencing their behavior even during the World War II bombings. The events of 1923 also served as a catalyst for long-term government efforts to foster neighborhood associations (''tonarigumi'') and promote civil defense, trends that intensified in the 1930s and during the war. The earthquake and its aftermath remain a subject of historical study and public memory, serving as a stark reminder of Japan's seismic activity and the complex interplay of disaster, society, and national identity.


See also

* 1293 Kamakura earthquake * 1703 Genroku earthquake *
1906 San Francisco earthquake At 05:12 AM Pacific Time Zone, Pacific Standard Time on Wednesday, April 18, 1906, the coast of Northern California was struck by a major earthquake with an estimated Moment magnitude scale, moment magnitude of 7.9 and a maximum Mercalli inte ...
* Amakasu Incident * List of earthquakes in 1923 * List of earthquakes in Japan * List of megathrust earthquakes


References


Works cited

* * *


Further reading

* Aldrich, Daniel P. "Social, not physical, infrastructure: the critical role of civil society after the 1923 Tokyo earthquake." ''Disasters'' 36.3 (2012): 398–419. * * * Borland, Janet. "Voices of vulnerability and resilience: children and their recollections in post-earthquake Tokyo." ''Japanese Studies'' 36.3 (2016): 299–317. * Clancey, Gregory. "The Changing Character of Disaster Victimhood: Evidence from Japan's 'Great Earthquakes'." ''Critical Asian Studies'' 48.3 (2016): 356–379. * * * Hunter, Janet. "'Extreme confusion and disorder'? the Japanese economy in the Great Kantō earthquake of 1923." ''Journal of Asian Studies'' (2014): 753–77
online
* Hunter, Janet, and Kota Ogasawara. "Price shocks in regional markets: Japan's Great Kantō Earthquake of 1923." ''Economic History Review'' 72.4 (2019): 1335–1362. * *
Pdf.
* * * * Weisenfeld, Gennifer. ''Imaging Disaster: Tokyo and the visual culture of Japan's Great Earthquake of 1923'' (Univ of California Press, 2012).


External links


The Great Kantō earthquake of 1923
– Great Kanto Earthquake.com *
Great Kanto Earthquake 1923
– Photographs by August Kengelbacher
Japan Earthquake 1923
Pathé News
The Great Kanto Earthquake of 1923
– Brown University Library Center for Digital Scholarship
The Great Kanto Earthquake Massacre
OhmyNews ''OhmyNews'' () is a South Korean online news website. It was founded by Oh Yeon Ho on 22 February 2000. The site's motto is "Every Citizen is a Reporter", which reflects its status as the first news website in Korea to accept, edit, and publi ...
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1923 Great Kanto Earthquake – Fire Tornado – Video
, Check123 – Video encyclopedia
Photograph Albums of the Great Mino-Owari (1891) and Great Kanto (1923) Earthquakes
at the Amherst College Archives & Special Collections {{DEFAULTSORT:Great Kanto Earthquake Earthquakes of the Taishō era Megathrust earthquakes in Japan Natural disasters in Tokyo Earthquakes in the Empire of Japan 1923 in Japan Kanto, Great 1920s in Tokyo Urban fires in Japan 1920s tsunamis 1923 1923 September 1923 Landslides in Japan 1923 disasters in Japan 1920s fires in Asia 1923 fires