Did You Know: Tokyo was Once known as Edo ?
Tokyo was originally known as Edo, which means “estuary”.
Its name was changed to Tokyo (Tōkyō: tō (east) + kyō (capital)) when it became the imperial capital in 1868, in line with the East Asian tradition of including the word capital in the name of the capital city.
During the early Meiji period, the city was also called “Tōkei”, an alternative pronunciation for the same Chinese characters representing “Tokyo”.
Some surviving official English documents use the spelling “Tokei”. However, this pronunciation is now obsolete.Tokyo shares the same meaning and character with Vietnam’s Đông Kin.