1923 The Great Kantō earthquake devastates Tokyo and Yokohama, killing about 105,000 people.
1945 General Douglas MacArthur moves his command headquarters to Tokyo.
1974 A powerful bomb explodes at the Mitsubishi Heavy Industries headquarters in Marunouchi, Tokyo, Japan. 8 are killed, 378 are injured. Eight left-wing activists are arrested on May 19, 1975 by Japanese authorities.
1982 A bomb explodes on Pan Am Flight 830, ''en route'' from Tokyo to Honolulu, killing one teenager and injuring 15 passengers.
1999 Japan's worst nuclear accident at a uranium reprocessing facility in Tōkai-mura, northeast of Tokyo.
2004 The first images of a live giant squid in its natural habitat are taken 600 miles south of Tokyo.