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South Kantō earthquakes or Greater Tokyo Area earthquakes are general terms for major earthquakes that occurs repeatedly historically in the southern part of Kanto region in Japan. It has been announced that there is a 70% chance that earthquakes of about M7 will occur in the southern part of the Kanto region within the next 30 years.
Tokyo is one of the largest cities in the world , if a large earthquake occurs in the southern part of the Kanto region, the damage is expected to be enormous. And also, indirect damage caused by the earthquake is thought to extend to the entire world for a long period of time. It has been announced that if a large earthquake occurs in the Greater Tokyo Area, would kill 23,000 people in the worst case.