<P> The 2011 Tōhoku earthquake and tsunami that devastated much of the northeastern coast of Honshu was felt in Tokyo . However, due to Tokyo's earthquake - resistant infrastructure, damage in Tokyo was very minor compared to areas directly hit by the tsunami, although activity in the city was largely halted . The subsequent nuclear crisis caused by the tsunami has also largely left Tokyo unaffected, despite occasional spikes in radiation levels . </P> <P> On September 7, 2013, the IOC selected Tokyo to host the 2020 Summer Olympics . Tokyo will be the first Asian city to host the Olympic Games twice . </P> <P> The mainland portion of Tokyo lies northwest of Tokyo Bay and measures about 90 km (56 mi) east to west and 25 km (16 mi) north to south . The average elevation in Tokyo is 40 m (131 ft). Chiba Prefecture borders it to the east, Yamanashi to the west, Kanagawa to the south, and Saitama to the north . Mainland Tokyo is further subdivided into the special wards (occupying the eastern half) and the Tama area (多摩 地域) stretching westwards . </P> <P> Also within the administrative boundaries of Tokyo Metropolis are two island chains in the Pacific Ocean directly south: the Izu Islands, and the Ogasawara Islands, which stretch more than 1,000 km (620 mi) away from the mainland . Because of these islands and the mountainous regions to the west, Tokyo's overall population density figures far underrepresent the real figures for the urban and suburban regions of Tokyo . </P>

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