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Metropolis (of Tokyo); (Tokyo) Metropolitan District; metropolitan prefecture
counter for cities and towns
capital
「都」 has another reading with different meanings.
私は東京都の郊外に住んでいます。
I live in Tokyo Metropolis.
都の中心部に行きました。
I went to the center of the metropolis.
都の景観は美しいですね。
The scenery of the metropolis is beautiful, isn't it?