capital city / (specifically) Kyōto (a city in Kyōto, Japan) / (especially) Tōkyō (a province of Japan)

the place where the emperor resides / a city that acts as an economic and political center; capital / metropolis

10,000,000,000,000,000, 10¹⁶, (US) ten quadrillion, (UK) ten thousand billion

castle

(obsolete, Okinawa) castle

(archaic) a castle, a fortress

a castle, a fortress

honorific form of 城

castle

Short for 日本国 (Nihon-koku): Japan (a country and archipelago in East Asia) / a surname