The Japan earthquake and tsunami of 2011 still registers in stark totals, with over 15,000 deaths confirmed and 2,527 missing as of 2023. That same magnitude of force produced a moment magnitude of 9.1 and a record peak ground acceleration of 2.7g, yet about 90% of deaths were caused by drowning in the waves rather than the shaking. From the Fukushima radiation evacuations of 162,000 people to the tsunami reaching 40.5 meters at Miyako, this post connects the human impact to the fault mechanics and lingering aftereffects across prefectures.
Key Takeaways
- Over 15,000 deaths confirmed, with 2,527 missing as of 2023.
- Iwate Prefecture reported 4,673 deaths and 774 missing.
- Miyagi Prefecture had 9,548 deaths, the highest toll.
- The 2011 Tōhoku earthquake had a moment magnitude of 9.0 to 9.1, making it the most powerful earthquake ever recorded by instrumental means and the fourth largest since 1900.
- The earthquake's epicenter was located approximately 70 kilometers east of the Oshika Peninsula of Tōhoku, with coordinates 38.322°N 142.369°E.
- The rupture along the subduction zone lasted approximately 3 minutes, with seismic waves propagating at varying speeds.
- Estimated direct economic loss from earthquake and tsunami was ¥16.9 trillion (US$210 billion).
- Over 123,000 houses completely destroyed.
- 29,500 km of roads damaged, costing ¥1.2 trillion to repair.
- Unit 1 at Fukushima Daiichi had core meltdown starting 5 hours after quake.
- Hydrogen explosion in Unit 1 reactor building on March 12, 2011.
- Total radioactive release estimated at 520,000 TBq iodine-131 equivalent.
- Maximum tsunami height recorded at Miyako was 40.5 meters.
- Run-up height at Aneyoshi reached 37.1 meters above sea level.
- Tsunami waves arrived at Sendai coast 28 minutes after earthquake.
Japan’s 2011 Tōhoku quake and tsunami killed over 15,000, mostly by drowning, and devastated Fukushima for years.
Related reading
01 · Category
Casualties and Human Impact17 stats
01
Over 15,000 deaths confirmed, with 2,527 missing as of 2023.
02
Iwate Prefecture reported 4,673 deaths and 774 missing.
03
Miyagi Prefecture had 9,548 deaths, the highest toll.
04
Fukushima Prefecture recorded 1,615 deaths and 2,247 missing.
05
Approximately 90% of deaths were due to drowning in the tsunami.
06
6,157 injuries reported across affected prefectures.
07
Over 162,000 people were evacuated from Fukushima due to radiation fears.
08
Elderly over 60 accounted for 65.4% of fatalities.
09
Children under 15 made up only 2.8% of deaths.
10
47,600 residential buildings completely destroyed.
11
Mental health issues affected 20% of survivors one year later.
12
Over 400,000 evacuees in temporary housing by end of 2011.
13
Suicide rates in affected areas rose by 10% post-disaster.
14
Foreign nationals deaths totaled 14, including 10 Chinese.
15
Rikuzentakata city lost 1,749 residents, 10% of population.
16
Over 1 million people received health checkups in relief efforts.
17
PTSD prevalence was 15.1% among Miyagi survivors.
Interpretation
Casualties and Human Impact Interpretation
Behind the staggering calculus of death and destruction lies a grimly efficient hierarchy of tragedy, where the sea was the primary executioner, the elderly bore the heaviest toll, and the survivors were left to navigate a second, silent disaster of evacuation, mental anguish, and broken homes.
02 · Category
Earthquake Magnitude and Seismology20 stats
01
The 2011 Tōhoku earthquake had a moment magnitude of 9.0 to 9.1, making it the most powerful earthquake ever recorded by instrumental means and the fourth largest since 1900.
02
The earthquake's epicenter was located approximately 70 kilometers east of the Oshika Peninsula of Tōhoku, with coordinates 38.322°N 142.369°E.
03
The rupture along the subduction zone lasted approximately 3 minutes, with seismic waves propagating at varying speeds.
04
Peak ground acceleration reached 2.7g at the K-NET Iwate station, the highest ever recorded worldwide.
05
The earthquake triggered over 1,000 aftershocks greater than magnitude 4.0 within the first month.
06
Seismic energy released was equivalent to 475 megatons of TNT, about 8,000 times the Hiroshima atomic bomb.
07
The fault slip was up to 50 meters along a 200 km by 500 km fault area.
08
P-wave arrival time at Tokyo was 00:46:50 JST on March 11, 2011.
09
The earthquake caused a static displacement of up to 5.3 meters horizontally and 3.3 meters vertically at GPS stations.
10
Focal depth was estimated at 24 to 30 km beneath the Pacific Ocean floor.
11
The mainshock was followed by a magnitude 7.9 aftershock 29 minutes later.
12
Broadband seismic records showed rupture propagation velocity of 2.0-2.5 km/s.
13
The earthquake shifted Japan's main island by 2.4 meters eastward.
14
Over 4,000 foreshocks and aftershocks were recorded in the year following the event.
15
The moment tensor solution indicated a thrust fault mechanism on the Pacific Plate subduction.
16
Ground shaking intensity reached JMA scale 7 in Kurihara, Miyagi Prefecture.
17
The earthquake's duration was over 6 minutes as felt in Tokyo.
18
Tsunami earthquake component contributed to underestimated initial magnitude.
19
Harvard CMT magnitude was revised from 9.0 to 9.1.
20
The event ruptured multiple segments of the Japan Trench.
Interpretation
Earthquake Magnitude and Seismology Interpretation
Mother Nature, in a display of raw power that beggars belief, shifted an entire island, shook the ground with the force of a planet's sigh, and delivered the energy of thousands of atomic bombs in a three-minute convulsion along a fault line the size of Italy.
03 · Category
Economic and Infrastructure Damage20 stats
01
Estimated direct economic loss from earthquake and tsunami was ¥16.9 trillion (US$210 billion).
02
Over 123,000 houses completely destroyed.
03
29,500 km of roads damaged, costing ¥1.2 trillion to repair.
04
2,126 road bridges collapsed or severely damaged.
05
4,062 km of railway lines disrupted.
06
Sendai Airport runway submerged under 5m tsunami water.
07
232 residents' lives lost in Okushiri fishing port alone.
08
Industrial production dropped 40% in March 2011 due to power shortages.
09
11,000 ha of farmland inundated by saltwater.
10
Cost to rebuild ports and harbors was ¥1.4 trillion.
11
47 dams failed or damaged, affecting water supply.
12
GDP impact was -0.5% in Q1 2011.
13
3.6 million tons of debris generated, cleanup cost ¥2.3 trillion.
14
1,044 schools damaged, 211 completely destroyed.
15
Healthcare facilities damage cost ¥200 billion.
16
2.5 million households without electricity immediately after.
17
Insurance payouts totaled ¥1.1 trillion.
18
Reconstruction budget allocated ¥19 trillion over 10 years.
19
Over 300 hospitals damaged or destroyed.
20
Fishing industry losses reached ¥100 billion.
Interpretation
Economic and Infrastructure Damage Interpretation
The sheer scale of destruction, from submerged airports to shattered supply chains, paints a grim portrait where the staggering ¥16.9 trillion price tag feels almost abstract until you remember it's measured in lost homes, ruined farms, and the profound quiet of hundreds of fishing ports mourning their residents.
04 · Category
Fukushima Nuclear Incident21 stats
01
Unit 1 at Fukushima Daiichi had core meltdown starting 5 hours after quake.
02
Hydrogen explosion in Unit 1 reactor building on March 12, 2011.
03
Total radioactive release estimated at 520,000 TBq iodine-131 equivalent.
04
Unit 2 containment failed on March 15 due to pressure suppression.
05
Over 160,000 residents evacuated from 20 km exclusion zone.
06
Peak radiation dose rate at plant gate was 101 mSv/h on March 15.
07
3.4 million becquerels per m² cesium-137 deposited in Fukushima.
08
Cooling systems failed due to loss of AC power at 15:37 JST.
09
Unit 4 spent fuel pool fire occurred on March 15.
10
Decontamination efforts covered 23,000 hectares by 2014.
11
TEPCO admitted groundwater contamination with 240 trillion Bq tritium.
12
IAEA rated accident as INES Level 7.
13
110,000 tons of contaminated water stored as of 2013.
14
Robot surveys found fuel debris in Unit 2 pedestal.
15
Annual radiation exposure limit set at 1 mSv for residents.
16
44,000 households in difficult-to-return zone as of 2021.
17
Decommissioning cost estimated at ¥22 trillion by 2060.
18
Seawater release of treated water began August 2023 with 1.3 million tons planned.
19
Thyroid cancer cases in screening rose to 266 by 2020.
20
Fuel removal from Unit 3 completed in 2021, 566 assemblies.
21
Over 900 fuel assemblies removed from Unit 4 pool by 2014.
Interpretation
Fukushima Nuclear Incident Interpretation
The Fukushima Daiichi disaster unfolded with relentless, cascading failures—from the initial meltdowns and hydrogen explosions to massive radioactive releases and the long-term evacuation of over 160,000 people—culminating in a cleanup so complex and costly that decommissioning will take decades and the full societal and environmental impact may never be fully tallied.
05 · Category
Tsunami Characteristics19 stats
01
Maximum tsunami height recorded at Miyako was 40.5 meters.
02
Run-up height at Aneyoshi reached 37.1 meters above sea level.
03
Tsunami waves arrived at Sendai coast 28 minutes after earthquake.
04
Maximum inundation depth in Kesennuma was 10 meters.
05
Tsunami traveled 10 km inland in Sendai plain.
06
Over 80% of tsunami deaths occurred within 3 km of coast.
07
Tsunami flow speeds exceeded 10 m/s in many bays.
08
The tsunami generated mega-boulders weighing up to 100 tons.
09
Far-field tsunami reached Hawaii with waves up to 2.7 meters.
10
Tsunami warning issued for Pacific rim countries within 3 minutes.
11
Inundation area totaled 561 km² across Iwate, Miyagi, Fukushima.
12
Tsunami height at Ofunato port was 40.1 meters.
13
Second tsunami wave was larger than first in many locations.
14
Tsunami deposited sediments up to 5 meters thick.
15
Waves propagated across Pacific at 700 km/h speed.
16
Over 11,000 fishing boats destroyed by tsunami.
17
Tsunami eroded coastline by up to 500 meters in places.
18
Maximum tsunami amplitude offshore was 3.2 meters.
19
The maximum tsunami run-up height in Japan was 40.5 m at Miyako.
Interpretation
Tsunami Characteristics Interpretation
Nature's brutal efficiency was on full display: a single earthquake spawned a tsunami that not only annihilated coastal communities with staggering 40-meter waves but also threw 100-ton boulders, erased 500 meters of coastline, and crossed an ocean at jet speed to remind the entire Pacific rim of its raw, indifferent power.
Reference
Cite This Report
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APA
Timothy Grant. (2026, February 13). Japan Earthquake Statistics. Gitnux. https://gitnux.org/japan-earthquake-statistics
MLA
Timothy Grant. "Japan Earthquake Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/japan-earthquake-statistics.
Chicago
Timothy Grant. 2026. "Japan Earthquake Statistics." Gitnux. https://gitnux.org/japan-earthquake-statistics.
Sources & references
55 datasets cited across this report · attribution is report-level