1923 Great Kantō earthquake
|Date||September 1, 1923|
|Countries or regions||Japan|
The Great Kantō earthquake (関東大震災 Kantō daishinsai ) struck the Kantō Plain on the Japanese main island of Honshū at 11:58:44 am JST (2:58:44 UTC) on Saturday, September 1, 1923. Varied accounts indicate the duration of the earthquake was between four and 10 minutes. This was the deadliest earthquake in Japanese history, and at the time was the most powerful earthquake ever recorded in the region. The 2011 Tōhoku earthquake later surpassed that record, at magnitude 9.0.
The earthquake had a magnitude of 7.9 on the Moment magnitude scale (Mw), with its focus deep beneath Izu Ōshima Island in the Sagami Bay. The cause was a rupture of part of the convergent boundary where the Philippine Sea Plate is subducting beneath the Okhotsk Plate along the line of the Sagami Trough.
This earthquake devastated Tokyo, the port city of Yokohama, and the surrounding prefectures of Chiba, Kanagawa, and Shizuoka, and caused widespread damage throughout the Kantō region. The power was so great in Kamakura, over 60 km (37 mi) from the epicenter, it moved the Great Buddha statue, which weighs about 93 short tons (84,000 kg), almost two feet.
Estimated casualties totaled about 142,800 deaths, including about 40,000 who went missing and were presumed dead. The damage from this natural disaster was the greatest sustained by prewar Japan. In 1960, the government of Japan declared September 1, the anniversary of the quake, as an annual "Disaster Prevention Day".
Damage and deaths
Because the earthquake struck at lunchtime when many people were cooking meals over fire, many people died as a result of the many large fires that broke out. Some fires developed into firestorms that swept across cities. Many people died when their feet became stuck in melting tarmac. The single greatest loss of life was caused by a fire tornado that engulfed open space at the Rikugun Honjo Hifukusho (formerly the Army Clothing Depot) in downtown Tokyo, where about 38,000 people were incinerated after taking shelter there following the earthquake. The earthquake broke water mains all over the city, and putting out the fires took nearly two full days until late in the morning of September 3. An estimated 6,400 people were killed and 381,000 houses were destroyed by the fire alone.
A strong typhoon struck Tokyo Bay at about the same time as the earthquake. Some scientists, including C.F. Brooks of the United States Weather Bureau, suggested the opposing energy exerted by a sudden decrease of atmospheric pressure coupled with a sudden increase of sea pressure by a storm surge on an already-stressed earthquake fault, known as the Sagami Trough, may have triggered the earthquake. Winds from the typhoon caused fires off the coast of Noto Peninsula in Ishikawa Prefecture to spread rapidly.
Many homes were buried or swept away by landslides in the mountainous and hilly coastal areas in western Kanagawa Prefecture, killing about 800 people. A collapsing mountainside in the village of Nebukawa, west of Odawara, pushed the entire village and a passenger train carrying over 100 passengers, along with the railway station, into the sea.
A tsunami with waves up to 10 m (33 ft) high struck the coast of Sagami Bay, Bōsō Peninsula, Izu Islands, and the east coast of Izu Peninsula within minutes. The tsunami killed many, including about 100 people along Yui-ga-hama Beach in Kamakura and an estimated 50 people on the Enoshima causeway. Over 570,000 homes were destroyed, leaving an estimated 1.9 million homeless. Evacuees were transported by ship from Kanto to as far as Kobe in Kansai. The damage is estimated to have exceeded USD$1 billion (or about $13,701 billion today). There were 57 aftershocks.
Altogether, the earthquake and typhoon killed an estimated 99,300 people, and another 43,500 went missing.
Postquake massacre of ethnic minorities and political opponents
The Home Ministry declared martial law, and ordered all sectional police chiefs to make maintenance of order and security a top priority. A false rumor spread was that Koreans were taking advantage of the disaster, committing arson and robbery, and were in possession of bombs. Anti-Korean sentiment was heightened by fear of the Korean independence movement, partisans of which were responsible for assassinations of top Japanese officials and other terrorist activity. In the confusion after the quake, mass murder of Koreans by mobs occurred in urban Tokyo and Yokohama, fueled by rumors of rebellion and sabotage. The government reported 231 Koreans were killed by mobs in Tokyo and Yokohama in the first week of September. Independent reports said the number killed was far higher ranging from 6,000 to 10,000. Some newspapers reported the rumors as fact, including the allegation that Koreans were poisoning wells. The numerous fires and cloudy well water, a little-known effect of a large quake, all seemed to confirm the rumors of the panic-stricken survivors who were living amidst the rubble. Vigilante groups set up roadblocks in cities, and tested residents with a shibboleth for supposedly Korean-accented Japanese: deporting, beating, or killing those who failed. Army and police personnel colluded in the vigilante killings in some areas. Of the 3,000 Koreans taken into custody at the Army Cavalry Regiment base in Narashino, Chiba Prefecture, 10% were killed at the base, or after being released into nearby villages. Moreover, anyone mistakenly identified as Korean, such as Chinese, Okinawans, and Japanese speakers of some regional dialects, suffered the same fate. About 700 Chinese, mostly from Wenzhou, were killed. A monument commemorating this was built in 1993 in Wenzhou.
In response, the government called upon the Japanese Army and the police to detain Koreans to defuse the situation; 23,715 Koreans were detained across Japan, 12,000 in Tokyo alone. The chief of police of Tsurumi (or Kawasaki by some accounts) is reported to have publicly drunk the well water to disprove the rumor that Koreans had been poisoning wells. In some towns, even police stations into which Korean people had escaped were attacked by mobs, whereas in other neighbourhoods, residents took steps to protect them. The Army distributed flyers denying the rumor and warning civilians against attacking Koreans, but in many cases vigilante activity only ceased as a result of Army operations against it.
Amidst the mob violence against Koreans in the Kantō Region, regional police and the Imperial Army used the pretext of civil unrest to liquidate political dissidents. Socialists such as Hirasawa Keishichi, anarchists such as Sakae Osugi and Noe Ito, and the Chinese communal leader, Ou Kiten, were abducted and killed by local police and Imperial Army, who claimed the radicals intended to use the crisis as an opportunity to overthrow the Japanese government.
The importance of obtaining and providing accurate information following natural disasters has been emphasized in Japan ever since. Earthquake preparation literature in modern Japan almost always directs citizens to carry a portable radio and use it to listen to reliable information, and not to be misled by rumors in the event of a large earthquake.
Following the devastation of the earthquake, some in the government considered the possibility of moving the capital elsewhere. Proposed sites for the new capital were even discussed.
Japanese commentators interpreted the disaster as an act of divine punishment to admonish the Japanese people for their self-centered, immoral, and extravagant lifestyles. In the long run, the response to the disaster was a strong sense that Japan had been given an unparalleled opportunity to rebuild the city, and to rebuild Japanese values. In reconstructing the city, the nation, and the Japanese people, the earthquake fostered a culture of catastrophe and reconstruction that amplified discourses of moral degeneracy and national renovation in interwar Japan.
After the earthquake, Gotō Shinpei organized a reconstruction plan of Tokyo with modern networks of roads, trains, and public services. Parks were placed all over Tokyo as refuge spots, and public buildings were constructed with stricter standards than private buildings to accommodate refugees. However, the outbreak of World War II and subsequent destruction severely limited resources.
Frank Lloyd Wright received credit for designing the Imperial Hotel, Tokyo, to withstand the quake, although in fact the building was damaged by the shock. The destruction of the US embassy caused Ambassador Cyrus Woods to relocate the embassy to the hotel. Wright's structure withstood the anticipated earthquake stresses, and the hotel remained in use until 1968.
The unfinished battlecruiser Amagi was in drydock being converted into an aircraft carrier in Yokosuka in compliance with the Washington Naval Treaty of 1922. However, the earthquake damaged the Amagi beyond repair, leading it to be scrapped, and the unfinished fast battleship Kaga was converted into an aircraft carrier in its place.
In contrast to London, where typhoid fever had been steadily declining since the 1870s, the rate in Tokyo remained high, more so in the upper-class residential northern and western districts than in the densely populated working-class eastern district. An explanation is the decline of waste disposal, which became particularly serious in the northern and western districts when traditional methods of waste disposal collapsed due to urbanization. The 1923 earthquake led to record-high morbidity due to unsanitary conditions following the earthquake, and it prompted the establishment of antityphoid measures and the building of urban infrastructure.
Beginning in 1960, every September 1 is designated as Disaster Prevention Day to commemorate the earthquake and remind people of the importance of preparation, as September and October are the middle of the typhoon season. Schools and public and private organizations host disaster drills. Tokyo is located near a fault zone beneath the Izu Peninsula which, on average, causes a major earthquake about once every 70 years, and is also located near the Sagami Trough, a large subduction zone that threatens to create a massive earthquake that, in the darkest case, would kill millions in the Kanto Region. Every year on this date, schools across Japan take a moment of silence at the precise time the earthquake hit in memory of the lives lost.
Some discreet memorials are located in Yokoamicho Park in Sumida Ward, at the site of the open space in which an estimated 38,000 people were killed by a single fire tornado. The park houses a Buddhist-style memorial hall/museum, a memorial bell donated by Taiwanese Buddhists, a memorial to the victims of World War II Tokyo air raids, and a memorial to the Korean victims of the vigilante killings.
Several Japanese films, books, and shows were based on this disaster, including the examples below.
In Japan Sinks, in one scene in the book, due to the fast-moving subduction of the Pacific and Eurasian plates, the Sagami Trough ruptures in a magnitude-8.5 earthquake, killing several million people in Tokyo and other areas, causing major tsunamis, and creating major firestorms.
In the film adaptation of Japan Sinks, Nihon Chinbotsu (1973 film), due to the fast-moving subduction of the Pacific and Eurasian plates, the Sagami Trough ruptures in a massive earthquake called "The Second Great Kanto Earthquake". The quake in the film flattens many buildings, causes Tokyo's three rivers to flood and wash out the lower east side of Tokyo in a series of tidal waves, and crushing overpasses and bridges, killing millions of people. Like the 1923 Kanto earthquake, the quake also causes a series of major firestorms that burn the Kanto Region to the ground. The quake in the film also flattened Yokohama, Chiba, and other large cities, killing millions more. In the film, all told, the quake killed between three and four million.
In the manga (cartoon) adaptation of Japan Sinks, the Second Kanto Earthquake killed over five million.
In Tokyo Magnitude 8.0, the Sagami Trough ruptures in a magnitude-8.0 earthquake, killing over 200,000 in Tokyo, causing floods and fires, and putting the main character at risk.
Waki Yamato's manga Haikara-san ga Tōru actually reaches its climax after the Great Kanto earthquake—which happens right before the wedding of the female lead, Benio Hanamura, and her second love Tousei. During it, the male lead, Shinobu Iijyuin, not only recovers his memory (which he had lost some time ago), but also sees his other love interest (Larissa) die; before dying, she begs him to leave her and search for Benio. Traumatised and injured, Shinobu does so and manages to find Benio among the wreckage, renewing their bond. Tousei arrives and, since they are both in great risk, each of the lovers beg Tousei to save the other's life; he manages to save them both and then concedes, allowing them to get married.
Similarly, the josei manga and anime Kasei Yakyoku (by author Makiko Hirata) also finishes few after the earthquake, as a corollary to the main love triangle between the noblewoman Akiko, her lover Taka, and Akiko's maid Sara.
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- Scawthorn, Charles, John M. Eidinger and Anshel J. Schiff. (2006). Fire Following Earthquake. Reston, Virginia: ASCE (American Society of Civil Engineers) Publications. 10-ISBN 0-7844-0739-8; 13-ISBN 978-0-7844-0739-4 (cloth)
- Schencking, J. Charles. "The Great Kanto Earthquake and the Culture of Catastrophe and Reconstruction in 1920s Japan," Journal of Japanese Studies (2008) 34#2 pp 295–331. online in project MUSE
|Wikimedia Commons has media related to 1923 Great Kantō earthquake.|
- Website and Online Image Archive of Great Kanto Earthquake Compiled by J. Charles Schencking, The University of Hong Kong
- Great Kanto Earthquake 1923 Online photo gallery by A. Kengelbacher
- Film footage of the 1923 Great Kanto earthquake
- The Great Kanto Earthquake of 1923: Materials from the Dana and Vera Reynolds Collection A Brown University Library Digital Collection
- Video: Frank Lloyd Wright's Imperial Hotel escaped major damage in earthquake
- USGS Earthquake Lists
- A Study by Kajima Construction Company
- The 1923 Kanto Massacre of Koreans in Japan: A Japanese Professor Reveals the Truth Article from Korean newspaper
- Additional information about the Great Kanto Earthquake
- Numerical simulation (2.6 MB) (or see 6.2 MB version), produced by Professor Nobuo Shuto of the Disaster Control Research Center, Tohoku University, Japan, shows the 1923 Kanto tsunami. Note that the structures in this model are rigid – in a real-life tsunami, coastal structures often are destroyed. (The QuickTime movie presented here was digitized from a video tape produced from the original computer-generated animation.)
- The 1923 Tokyo Earthquake Includes links to 86 photos of the quake's aftermath
- Japanese massacre of Korean civilians after Kanto earthquake from ohmynews.com