The capital of Japan is TOKYO, which has five letters. Nara, another city in Japan, also has four letters. Kyoto and Osaka are two other cities in Japan that have five letters each. EDO is a third city in Japan with three letters. All of these cities have been important throughout Japanese history, with Nara being the first permanent capital of Japan, Kyoto being the imperial capital for over 1000 years, EDO being the de facto capital during the Tokugawa shogunate, and TOKYO and Osaka becoming major economic centers in modern times.