Japan experiences about 1,500 earthquakes strong enough to be felt each year, a staggering number that would seem catastrophic to most countries. However, despite being located in one of the most seismically active places on Earth, Japanese cities rarely see large-scale building collapses after major earthquakes.
The contradiction became more apparent after recent earthquakes that struck other parts of the world, where buildings collapsed and lives were lost. So, what makes Japan different? The answer lies not in luck, but in decades of scientific research, world-leading engineering, stringent building regulations, cutting-edge technology, and a culture of preparedness that have transformed one of nature’s greatest threats into a manageable one.
Why does Japan experience so many earthquakes?
Japan’s location represents its greatest geographic challenge and is also the reason for its extraordinary resilience to earthquakes. The country lies at the intersection of four major tectonic plates: the Pacific Plate, the Philippine Sea Plate, the Eurasian Plate, and the North American Plate (or the Okhotsk Microplate, according to some geological models). These plates are constantly moving, colliding and sliding under each other.
According to the USGS, about 10 percent of the world’s earthquakes and about 20 percent of earthquakes of magnitude 6 or greater occur in and around Japan. The country records thousands of seismic events annually, although only about 1,500 of them are strong enough for people to notice.
Buildings in Japan are designed to move, not to fight an earthquake
One of Japan’s greatest engineering achievements is that its buildings are designed to move with the earthquake rather than rigidly resist it.Modern Japanese skyscrapers and many public buildings use a technique known as core insulation. Thick layers of rubber and steel bearings are installed between the building’s foundation and its superstructure. During an earthquake, these bearings absorb much of the ground movement before it reaches the building above.Another widely used technology is seismic dampers, often compared to shock absorbers found in a car.
These devices dissipate the energy generated by earthquake vibrations, reducing the extent to which the building sways.Research published by the National Research Institute for Earth Sciences and Disaster Resilience has shown that insulated buildings with foundations experience much less vibration than traditional structures during strong earthquakes. Today, thousands of buildings across Japan incorporate some form of seismic isolation or energy dissipation technology.
Strict building codes have saved countless lives
Japan’s building regulations are among the strictest in the world, but they have been shaped by painful lessons.The devastating Great Kanto Earthquake killed more than 100,000 people and exposed weaknesses in urban construction. Decades later, the Great Hanshin Earthquake prompted another major overhaul of earthquake resistance standards after more than 6,000 people lost their lives.In the wake of these disasters, Japan introduced increasingly stringent seismic design requirements.
Buildings built according to modern standards must withstand strong vibrations without collapsing, even if they are damaged.The result was wonderful. During the 2011 Tohoku earthquake and tsunami, one of the strongest earthquakes ever recorded, relatively few modern buildings collapsed due to the shaking itself. Most of the approximately 20,000 deaths were caused by the massive tsunami that followed, highlighting the effectiveness of earthquake engineering in Japan.
Every major earthquake makes Japan safer
Unlike many countries that rebuild after disasters, Japan also learns from every earthquake.Engineers carefully examine damaged structures, collect data, review construction standards and improve future building designs. This continuous cycle of learning has been going on for decades.Researchers at the Building Research Institute and universities across the country are conducting large-scale experiments using giant earthquake simulators.
One of the world’s largest shaking tables, known as E-Defense, allows scientists to recreate powerful earthquakes and monitor the performance of full-scale buildings before recommending improvements to building standards.
Japan has one of the fastest earthquake warning systems in the world
Japan cannot predict earthquakes days or weeks in advance, but it can detect earthquakes within seconds after they start.The country’s earthquake early warning system, run by the Japan Meteorological Agency, uses more than a thousand seismic stations across the country.When an earthquake begins, sensors detect fast-moving primary waves, known as P waves. These waves travel faster than more destructive secondary waves, giving people a few seconds to tens of seconds of warning.This brief warning is enough to send alerts to mobile phones, stop high-speed trains, slow down elevators, stop factory machinery, and allow people to move away from immediate dangers.
Even express trains stop automatically
Japan’s famous Shinkansen bullet trains are directly connected to the National Earthquake Detection Network.Once seismic sensors detect significant shaking, trains automatically apply emergency brakes before the strongest waves arrive. This system has worked successfully during many earthquakes and has become one of the world’s best examples of integrating infrastructure with disaster management technology.
Earthquake drills are part of everyday life
Technology alone is not responsible for Japan’s resilience.Children start practicing earthquake drills from an early age.
Schools, offices, hospitals and businesses regularly conduct emergency evacuation drills. Many families keep emergency kits containing food, drinking water, flashlights, batteries, and medical supplies.This focus on preparedness means that people know how to act quickly rather than panic when an earthquake strikes.The United Nations Office for Disaster Risk Reduction has repeatedly highlighted Japan as a global leader in disaster risk reduction due to its combination of public education, engineering and government planning.
Ancient Japanese architecture also inspired modern engineering
Interestingly, Japan’s wisdom on earthquakes is not entirely up-to-date.Many traditional wooden temples have survived centuries of earthquakes. Their flexible timber frames, interlocking wooden joints and central column known as shinbashira allow them to absorb seismic energy rather than rigidly resist it.Modern engineers have studied these ancient structures extensively. Research by institutions including Kyoto University has helped explain why these centuries-old buildings perform so well during earthquakes, and has inspired aspects of modern earthquake engineering.
The real reason Japanese cities are standing strong
Japan’s resilience is not the result of a single hack, but rather the result of a combination of many layers of protection. Strict building codes, advanced seismic engineering, ongoing scientific research, sophisticated early warning systems, regular public drills, strong government planning and a desire to learn from every disaster all work together.