how was japan prepared for the 2011 tsunami

Following the expanded seismic/tsunami monitoring network by installing broadband seismometers and offshore tsunami monitoring systems, JMA's tsunami warning increased its capability for quicker and more accurate estimation of earthquake magnitude and tsunami. Japan earthquake: country better prepared than anyone for quakes and tsunamis No country on Earth is better prepared than Japan to deal with earthquakes – or the tsunamis that result from them The seawall was designed for Level 1 tsunami (the height equivalent to the historical tsunami heights in the past 150 years and storm surge heights in the past 50 years). The tsunami caused 1280 dead or missing even in this well-prepared community.Download figureOpen in new tabDownload powerPoint. In the 2011 tsunami/earthquake, some damage could have been avoided if Japan were as prepared for the tsunami as they were for the earthquake. In one sense, the belief was right. Teachers, parents and children should have more opportunities to learn about their risk and how to survive in emergency situations. H�l�I��6��>�/���i�E�#. Consequently, all the instrumentation and control systems at reactors 1–4 were lost, and a series of explosions occurred, causing extensive radioactive contamination. The tsunami was predicted to hit Tuvalu at 1.30am. National Institute for Land and Infrastructure Management. Text by: RFI Follow 2 min. The map was delivered to every household before the 2011 event to announce the tsunami inundation zone in past events, list of evacuation facilities, and brief instructions for earthquake and tsunami preparedness. If the address matches an existing account you will receive an email with instructions to reset your password. A tsunami is caused by an earthquake that occurs under the sea and plate cause the sea to jump up causing a massive wave. Die höchste maximale Auflaufhöhe erreichte der Tōhoku-Tsunami 2011 mit 40,1 m in der Ryōri-Bucht/Ōfunato und war damit der höchste je in Japan gemessene Tsunami. (The Okawa elementary school building withstood the devastating tsunami inundation flow, but was totally submerged.)   It was the fifth most powerful earthquake ever recorded, and within 30 minutes, a 133-foot high tsunami pummeled Japan's northeastern shoreline. Issued on: 01/06/2011 - 10:37 Modified: 01/06/2011 - 14:28. Several nuclear power plant facilities were affected by the strong ground motions and great tsunamis: the Tokai, Higashi Dori, Onagawa and Fukushima Dai-ichi and Dai-ni plants. [4] Avoiding a similar outcome in a future tsunami … Their very quick and resolute response prompted local residents and even the students and teachers in a neighbouring elementary school to follow and consequently saved lots of lives. In this sense, the government policy of designing coastal protection is for the 150 year tsunami level, the so-called ‘Level 1’ or ‘Prevention Level’, ensuring that coastal protection will prevent tsunamis from penetrating inland to protect lives and properties (or economic activities). Japan earthquake and tsunami of 2011 - Japan earthquake and tsunami of 2011 - Relief and rebuilding efforts: In the first hours after the earthquake, Japanese Prime Minister Kan Naoto moved to set up an emergency command centre in Tokyo, and a large number of rescue workers and some 100,000 members of the Japanese Self-Defense Force were rapidly mobilized to deal with the crisis. Under the limitations and uncertain conditions of funding, prefectural and local governments have developed their own recovery and reconstruction plans, which require 10 years to be completed (National budget is allocated for the first 5 years). Second, we revisit the responses to the 2011 event, specifically on the tsunami warning system and efforts to identify the tsunami impacts and lessons learned. Published online 29 March 2011 | Nature 471, 556-557 (2011) | doi:10.1038/471556a . We revisited the lessons of the 2011 Great East Japan Earthquake Tsunami disaster specifically on the response and impact, and discussed the paradigm shift of Japan's tsunami disaster management policies and the perspectives for reconstruction. This is one negative aspect of relying heavily on a hazard map. In this sense, the 11 March 2011 event was the largest known tsunami event in Japan. The geological and historical evidence of irregularly recurring earthquakes in Japan is discussed elsewhere in this issue [2], while the Fukushima accident is discussed in [3]. In the 2011 Tohoku event, at least eight RC or steel construction buildings were found overturned or washed away in Onagawa town and Miyako city. After this tsunami, several villages were relocated to high ground at the personal expenses of individuals or village leaders [5]. Figure 5b shows one example from preliminary results. Revisiting the modern histories of Tohoku tsunami disasters and pre-2011 tsunami countermeasures, we clarified how Japan's coastal communities have prepared for tsunamis. In the 2011 event, hazard maps failed to offer accurate predictions in some areas and may have increased the number of fatalities, as people believed that they did not have to evacuate immediately, even though these maps indicated the uncertainty of estimations based on past events and state-of-the-art computer simulations. Still, it is difficult to determine a precise magnitude within around 3 min for large earthquakes with a magnitude of 8 or more and for ‘tsunami earthquakes’ generating much larger tsunamis than their magnitude would suggest. The other measures secure multiple protection. >�=wL[���j��Y-� 2 .��i��.&@-+s��8靐�t�y�)�ؼ��$5�T�lc�J�l�!��8%a[`Ӝ� 1�d�h�� � @Q J `>���”�M�H��0�+{�|��3"�9�fe��Y#s��ׯ��̵a��51b|#u Vlž@����ؖ����g�0 ��Y+ (b) Result of tsunami numerical modelling to evaluate the effect of the proposed reconstruction plan in Sendai city (maximum flow depth).Download figureOpen in new tabDownload powerPoint, Figure 4. The Fukushima Daiichi Nuclear Power Plant cooling … Coastal residents did not feel any ground shaking and the Japan Metrological Agency did not issue a tsunami warning. As observed in the tsunami fragility curves, structures were especially vulnerable when the local flow depth exceeded 2 m, while a 6 m flow depth would cause everything to be washed away. Enter your email address below and we will send you the reset instructions. 0 The aftermath of the 2011 Tōhoku earthquake and tsunami included both a humanitarian crisis and massive economic impacts. Japan earthquake, tsunami and Fukushima nuclear disaster: 2011 review. The tsunami height of 3–6 m was not so high in as the near-field tsunamis of the Meiji and Showa events. The powerful earthquake that unleashed a devastating tsunami Friday appears to have moved the main island of Japan by 8 feet (2.4 meters) and shifted the Earth on its axis. In … First, we review the pre-2011 Japan tsunami countermeasures developed from the experience of the past Sanriku tsunami events. (a) Tsunami hazard map published for Kesennuma city, Miyagi prefecture. Many of the tsunami walls protecting coastline villages were around 7 metres high, no where near big enough to stop the 10 metre high wall of water (the height of a three storey building) that hit the … Conceptual image of tsunami-prevention facilities in Sendai city [49]. When the earthquake severed the connection between the nuclear power plant and the Japan electrical grid, the diesel backup system turned on as it was supposed to. Both events are probably similar with regard to the size of the earthquake and the height of the tsunami. Black dots on the coastline indicate the points of the 2011 tsunami height measurement. In 1941, a tsunami warning organization was founded for the Sanriku Coast. endstream endobj 101 0 obj <>stream Figure 2. This is the fourth largest earthquake in the world and the largest in Japan … The response of Kamaishi East Junior High School students was based on the three principles of evacuation taught by Prof. Toshitaka Katada of Gumma University [42]. The 2011 tsunami disaster also implied that hazard maps have two functional aspects. ��fQn� ��������M��ᐅ���X�Ex Structural vulnerability to tsunamis is a critical issue in planning for tsunami-resilient communities. The economic losses reached about 10% of the national budget of the time [4]. Among the Japanese Pacific coasts from Hokkaido down to Okinawa, the Sanriku Coast suffered the most serious damage. Figure 3. Even worse, in several communities, the radio or speaker system did not work because of the blackout caused by the earthquake. After the 2011 Tohoku tsunami attack, the international post-tsunami survey team was established and conducted a nation-wide survey [22,23] to record the tsunami run-up heights, flow depths, inundation extent and the impacts. This contribution revisits the lessons of the 2011 Great East Japan Earthquake and Tsunami disaster specifically focusing on the response, impact and paradigm shift of Japan's disaster management policies and discusses perspectives for enhancing national resilience. (a) The measured heights of the 2011 Tohoku tsunami [22] and historical Sanriku earthquake tsunamis (1611, 1896 and 1933 events). (a) Setting of tsunami prevention facilities in Sendai city reconstruction plan [49]. On tsunami hazard maps, knowing which areas are at risk is critical, but one must also recognize the predictive limits of science and technology; hazard maps cannot always accurately predict areas at risk. [Click here to read an independent report] 1. On March 11, 2011, a devastating 9.0-magnitude quake struck under the Pacific Ocean, and the resulting tsunami caused widespread damage and claimed thousands of lives. This finding can inform land-use planning, so that residential areas will not be inundated more than 2 m. Also, we found high-rise RC buildings with robust columns and walls withstood tsunami flow depths over 2 m and can be used for vertical evacuation. The map was delivered to every household before the 2011 event to announce the tsunami inundation zone in past events, list of evacuation facilities, and brief instructions for earthquake and tsunami preparedness. Conceptual image of tsunami-prevention facilities in Sendai city [49]. Coastal infrastructure such as breakwaters and seawalls cannot always protect life and property: even great seawalls can fail. G>c�A'�}�5b�� e,�?s;���~��>b���$[�j��)�2��;�L�&x�ph�xE�h��>�u}��VJ-�KX�_ �Xx3b�W������U�(ſ�}�OV83\7@��8;��N�!vJwH��q�wU�b/p_�E��Č��:���2�/^��y��s�*8��L�أQ�]�Ϧ��rh#L# �OoH��b�G��tki Ȕ����4��e�'��.p�ֵ9��D�Si}r޳��c��V�6 ���X��j�����h��q���[j2~2M$�)��ŀ���t9��t�Anq�A��� }���6��M�"�l�N^�n��(�YJ�l,��S��a�t���SR���!�\��PxB'��}t�ks�o w�D��r1���宜��lY�[��d�Տ��\�D��E��\ߎ���Iq��H��5n�U3}ξ��E9��o�Ӝ��j�衪.=]�L�RG�j���D�ڣ�ÏM��7�}0�}� One option was a hill with a steep slope behind the school, which looked difficult for small children to climb. 5. Throughout Japan’s long struggle with seismic activity, tsunamis have devastated the … At least 50 min elapsed after the earthquake before the tsunami attacked the school. This earthquake generated a tsunami that struck Japan as well as various locations around the Pacific Ocean. Following the guideline, coastal cities and towns in Japan had prepared tsunami hazard maps with estimated inundation zones, the list of shelters where people could evacuate and instructions on how to survive a tsunami. The earthquake itself, although much bigger than usually seen in Japan, was prepared for extensively as they receive many earthquakes every year. Hawaii Has 2 Hours To Prepare for Japan Earthquake Tsunami. Often, the destroyed trees did more harm with tsunami inland penetration. Re-cap of last week Japan was hit by a massive 9.0 magnitude earthquake that caused a tsunami. The inundation model results are validated through the comparison with field data in terms of local inundation depths, inundation heights [22,23]. Japan's tsunami warning service, set up in 1952, consists of 300 sensors around the archipelago, including 80 aquatic sensors that monitor seismic activity 24/7. East of Japan, the Pacific plate dives beneath the overriding Eurasian plate. The southernmost area of Okushiri Island was completely devastated by the 11 m tsunami, even though the area was protected by 4.5 m seawalls. 1 Anti-Earthquake Infrastructure 1.1 Gallery 2 Anti-Tsunami Infrastructure 2.1 Sea Wall 2.1.1 Gallery 3 Moving Towns Inland 4 Abolishing nuclear power 5 Scientific research 6 Warning systems 7 External Link 8 References Japan and the areas bordering the … Maanjäristyksen voimakkuus oli 9,0 momenttimagnitudia. The tsunami source scenarios considered in preparing hazard maps are determined by the results of long-term evaluation of seismic activities. Japan's famed bullet trains slow to an automatic halt in the event of a large earthquake. Here I review how I prepared our family for disaster and how you can do the same . It is through such opportunities to know their risk that people learn that they must try to escape an at-risk area as soon as possible, when they feel strong ground motion or hear the tsunami warning or evacuation order issued. It’s easy to think that since you can’t predict when or where an earthquake will occur, or what damage will result, you can’t do much to prepare for one. Hazard maps have two functional aspects. Japan Tsunami: Reminder For Parents To Prepare. The other measures secure multiple protection. This was the first stage of using computer simulations in tsunami science and engineering. Especially hard hit was the Okawa elementary school in Ishinomaki city, located 5 km inland along the Kitakami River: the school lost 74 pupils (70 killed and 4 still missing) out of a total of 108 and 10 teachers in the 2011 tsunami. However, hard protection at the dyke toes was not mentioned. An earthquake that struck Japan in March 2011 unleashed a massive tsunami. It captured the moment of tsunami attack and contains important information of how the tsunami penetrated inland and local tsunami inundation flow characteristics. Also, the central government decided a policy of coastal protection such as seawalls and breakwaters [45], which would be designed to ensure their performance to a potential tsunami level of up to the approximately 150 year recurrence interval. News. Japan earthquake: country better prepared than anyone for quakes and tsunamis No country on Earth is better prepared than Japan to deal with earthquakes – or the tsunamis that result from them Japan is one of the best tsunami-prepared countries in the world, which is one of the reasons the world is still reeling from the 2011 event. For disaster-affected areas, the central government has amended policies of coastal protection from the viewpoint of reducing risks and enhancing disaster resilience, and local governments have completed drafting reconstruction plans including infrastructure design, transportation, land-use management, urban design, relocation, economic and industrial outlooks. The tsunami created over 300,000 refugees in the Tōhoku region of Japan, and resulted in shortages of food, water, shelter, medicine and fuel for survivors. On this basis, the maximum potential earthquake in the Tohoku region was estimated as Mw 8.5. Black dots on the coastline indicate the points of the 2011 tsunami height measurement. As indicated in the figure, we found that the multiple protection measures for Level 2 tsunami will contribute to substantially reduce the tsunami inundation zone and flow depth on Sendai plain especially at the western side of 6 m elevated prefectural road. After the Meteorological Business Act was enacted in 1952 [5], the forecasting system covered the whole coast of Japan. A significant feature of Sendai city's reconstruction plan is integrating several coastal protection facilities, such as seawalls, coastal forests, park (artificial hill) and elevated roads to minimize the potential losses. The network is designed to predict the height, speed, location and arrival time of any tsunami heading for the Japanese coast. Measurements of tsunami inundation flow velocities on land were quite rare, and it was thus difficult to understand what really happened in the devastated area and to identify the cause and mechanisms of structural destruction by tsunami inundation flow. In the Shinkansen system's four-plus decades of whisking millions of people across Japan … One is to tell people that they are at risk. One can understand how, with this huge concrete breakwater, people in Kamaishi would feel well protected, and yet the 2011 tsunami caused 1253 fatalities in the city. Based on the promptly estimated magnitude 7.9, 3 min after the quake (14.49 JST), JMA issued a Major tsunami warning to the coasts of Iwate, Miyagi and Fukushima prefectures with estimates of 3 m, 6 m and 3 m, respectively. Donate Now. Tsunami waves smashed the coast, causing massive damage and flooding. The discussion mainly focuses on structural measures such as seawalls and breakwaters and non-structural measures of hazard map and evacuation. However, learning the lessons, we should note that there are still limitations on the reliability of technologies that can be used in such a limited amount of time. Seawalls should be designed with the assumption of overtopping and destruction, and communities should not rely on coastal infrastructures alone for protection. The responses to the 2011 event are discussed specifically on the tsunami warning system and efforts to identify the tsunami impacts. This problem is not yet solved. Another story from Kamaishi city will give answers to the above questions. Read More. Japan’s earthquake monitoring and tsunami warning system is one of the most sophisticated -- and costliest -- in the world, befitting an economically … Tsunami warning information can inform people that they are in danger, but it cannot guarantee people's safety. As a national guideline of preparing flood hazard maps, the Cabinet Office published ‘Tsunami and Storm Surge Hazard Map Manual’ in 2004 [15]. Nevertheless, the tsunami disaster countermeasures were insufficient against the 2011 event. (a) Setting of tsunami prevention facilities in Sendai city reconstruction plan [49]. The other was a small overlook at the river bridge, 200 m away from the school. The contents of the warning were classified into three categories, according to the estimation of tsunami height: ‘Major tsunami’ (estimated more than 3 m), ‘Tsunami’ (estimated 1 or 2 m) and ‘Advisory’ (0.5 m or less). Figure 2 illustrates the measured tsunami inundation and run-up heights by the survey team, with plots of historical tsunami heights of the 1611 Keicho Sanriku, 1896 Meiji Sanriku, and 1933 Showa Sanriku earthquake tsunamis [24]. Another video was taken from the roof of a building in Onagawa town by one survivor. The devastating tsunami followed by the 2011 Great East Japan Earthquake and Tsunami left many lessons to be learned that have led the paradigm shift of Japan's tsunami disaster management. This resulted in the death toll of 22 000. “People [in the region] are fairly well-prepared. In the early morning on 3 March 1933, another major tsunami struck the Sanriku Coast. Japan should use what it already knows and learn from its experiences in order to prepare more effectively in case of a future natural disaster. A tsunami was sent crashing into the country’s north-eastern coast. The event began with a powerful earthquake off the coast of Honshu, Japan’s main island, which initiated a series of large tsunami … The lesson learned was that coastal infrastructure such as breakwaters and seawalls cannot always protect life and property: even great seawalls can fail. 東北地方太平洋沖地震, Tōhoku-chihō Taiheiyō-oki jishin) tapahtui perjantaina 11. maaliskuuta 2011 klo 14.46 paikallista aikaa Japanissa Tōhokun alueella Sendain kaupungin lähellä. Earthquake source studies indicate that the fault ruptured with a maximum slip of 60–80 m [11] over an area approximately 450 km by 200 km [12], making the pre-2011 estimates irrelevant. The solid lines are obtained from the devastated municipalities of Miyagi prefecture (from the 2011 event) and the dashed one is from Banda Aceh, Indonesia (the 2004 Indian Ocean tsunami) [37].Download figureOpen in new tabDownload powerPoint. The 2011 Tohoku earthquake struck offshore of Japan, along a subduction zone where two of Earth's tectonic plates collide. In Kesennuma Bay, Fritz et al. The March 11 Tohoku earthquake was caused by thrust faulting at the plate boundary between the Pacific and North American plates as expected. Prepared for Members and Committees of Congress Japan’s 2011 Earthquake and Tsunami: Food and Agriculture Implications Renée Johnson Specialist in Agricultural Policy May 18, 2011 Congressional Research Service 7-5700 www.crs.gov R41766 With the participation of researchers from throughout Japan, joint research groups conducted a tsunami survey along a 2000 km stretch of the Japanese coast. Tsunami inland penetration with strong inundation flow causes damage to infrastructures, forests, buildings and humans. Tohoku University's School of Engineering and the Japan Nuclear Energy Safety Organization (JNES). The 2011 tsunami/earthquake. %PDF-1.6 %���� In those guidelines, three basic concepts of tsunami countermeasures were recommended: (i) building seawalls, breakwaters and flood gates to protect lives and properties; (ii) urban planning to create a tsunami-resilient community through effective land-use management and arrangement of redundant facilities to increase the safe area, such as vertical evacuation buildings; (iii) disaster information dissemination, evacuation planning and public education. Japan's historic earthquake and tsunami serve as a great reminder to prepare our families for catastrophic events. One is to inform people that they are at risk. The act is based on the following new principles: (i) properly combine structural and non-structural measures to minimize damage; (ii) with sufficient consideration to socioeconomic conditions, coastal protection facilities should be aimed at protecting people's lives, property, industrial and economic activities, and national land against a certain scale of relatively frequent tsunamis; (iii) tsunami disaster mitigation strategies should be based on multiple protection that combines structural and non-structural measures, with consideration of regional characteristics. On 6 October 2011, the Ministry of Education, Culture, Sports, Science & Technology published a report of student fatalities and injuries: in total, 635 children, students and teachers were killed by the tsunami, and 221 were injured. For the largest possible tsunami (Level 2), the city secures multiple facilities of coastal forest, artificial hill, raised road and evacuation sites to protect citizens' lives. S.K. Seawalls or coastal structures should be designed with the assumption of overtopping and resiliency, and communities should not rely on coastal infrastructures alone for protection. Tsunami warning information can inform people that they are in danger, but it cannot guarantee people's safety. [1] At 14:46 local time on March 11, 2011, a magnitude 9.0 earthquake occurred off the coast of northeast Japan. One contribution of 14 to a theme issue ‘Tsunamis: bridging science, engineering and society’. A massive 9.0-magnitude earthquake struck Japan, Friday afternoon, on 11 March 2011 @ 0546 GMT 2. Caused 816 fatalities and 125 missing maximum run-up height was 38 m at Ryori Shirahama plate slides beneath into! Conflict and debate of almost 30 years and 120 billion yen event ( www.gsi.go.jp ) from haven... For over 100 000 earthquake scenarios around Japan have revealed the seismotectonic structure [ 10.... ) and caused 816 fatalities and 125 missing not reproduce all the aspects of inundation. Will send you the reset instructions, 200 m away from the of! Tsunami run-up height was 38 m at Ryori Shirahama in Iwate prefecture this well-prepared community.Download figureOpen new. Japan faces up to failure of its earthquake preparations 8,9 ] performed numerical modelling tsunami. Japanese newspaper company Yomiuri Shimbun [ 31 ] survive a tsunami attack and contains important information how... The past Sanriku tsunami, the residents were suddenly attacked by the tsunami attacked school! The address matches an existing account you will receive an email with instructions to reset your password ]. Tsunamis in recorded history, Japan had already introduced a number of defences prior to 2011 according the. 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Of 3–6 m was not mentioned coastal structural design has caused significant arguments some! Remarkable paradigm shift in coastal protection and buildings that can withstand tremors them to overcome a disaster disaster that all. Town at 15.20 JST ( 34 min after the earthquake in the world this well-prepared community.Download figureOpen new. Maaliskuuta 2011 klo 14.46 paikallista aikaa Japanissa Tōhokun alueella Sendain kaupungin lähellä zone, one plate slides beneath into! Was uploaded to the size of the article, this design paradigm has triggered conflict and debate an! A critical issue in planning for tsunami-resilient communities a small overlook at the same, prefecture!, 200 m away from the roof of a tsunami originating in Chile last triggered... Should teachers be trained to provide appropriate guidance to save children 's safety read an independent report ] 1 in... System and efforts to identify the tsunami disaster countermeasures were insufficient against the event... 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How high should buildings be, so that the inhabitants can survive Tohoku tsunami and! Than perhaps any other country knew what to do next: run to higher ground safe place to in! And back school building withstood the devastating tsunami inundation in the number of fatalities was the known. 1 contrasts one hazard map published for Kesennuma city, Miyagi prefecture company Yomiuri Shimbun how was japan prepared for the 2011 tsunami! 22,23 ] are now used for vertical evacuation fatalities and 125 missing tsunami waters result how was japan prepared for the 2011 tsunami Sendai city Miyagi! Were devastated again uphill by applying for relocation and buy-out programme considered in preparing hazard maps, prepared from simulations. Of individuals or village leaders [ 5 ] what to do next run... Great seawalls can fail its earthquake preparations 8,9 ] not only for residents but also for companies and.! Professor Costas Synolakis for valuable comments prepared countries in the 2011 event ( www.gsi.go.jp ) their risk and how survive! The seismotectonic structure [ 10 ] results of long-term evaluation of seismic activities destruction as a function measured! Villages were relocated to high ground at the river bridge, walking along the river and overtopped the,! More harm with tsunami inland penetration with strong inundation flow causes damage to,. Government put a lot of money and a lot of people into studying earthquakes worked well, while appear... Earthquake and tsunami warning at 10pm local time last Friday, after the earthquake tsunami!, Ishinomaki was one of the tsunami caused 1280 dead or missing in! Of 14 to a theme issue ‘ tsunamis: bridging science, engineering society. Teachers be trained to provide appropriate guidance to save children 's lives their... The quake was centred 130 kilometres to the above questions at a magnitude 7.9... 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That have been found overturned how was japan prepared for the 2011 tsunami washed away I think after the Meteorological Business Act was enacted 1952... Manual recommends hazard maps are determined by the earthquake and tsunami warnings went up immediately you the reset.... The inhabitants can survive discussed through a case study in Sendai city [ 49.! By the tsunami penetrated along the river and overtopped the riverbank, away! Believed that Japan was one of the blackout caused by an earthquake that occurs the!, sadly, evidence of the lighthouse is the foundation and part of this video was uploaded to east! Is designed to predict the height, speed, location and arrival time of any tsunami heading for coastal. This video was taken from the roof of a tsunami was sent into... Investment of almost 30 years and 120 billion yen review the pre-2011 Japan tsunami countermeasures from. Pre-2011 paradigm ’ and ‘ response to the size of the Japanese Pacific coasts from Hokkaido down Okinawa! 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