訓 みやこ ・ 音 ト,ツ
Sino-Vietnamese: đô
The town radical 阝 on the right gives the meaning, 者 the sound. Han Viet do, as in thu do (capital) and do thi (city).
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京都は古い都です。 (きょうとはふるいみやこです)
Kyoto is an old capital.