Tokyo is a seismicity, at risk from earthquakes. In 1923 an earthquake killed 142,000 people, one of the biggest disasters to strike the city.
Central Tokyo is a high-density urban area, with many skyscrapers and residential developments. To maximize land space, there is a concentration on access by high-speed rail, as opposed to car which necessitates more area taken up by roads – bullet trains are one of its most famous icons. The city is a major international financial and technological centre of business and, despite its traditions of culture and history, thought of as one of the most modern in the world.