City center or downtown area (especially used for the center of Tokyo); the heart of a city, including commercial and entertainment districts.
週末は都心のショッピングモールが混雑する。
On weekends the shopping malls in the city center get crowded.
都心の家賃は郊外より高いことが多い。
Rent in the city center is often higher than in the suburbs.
彼女は都心で働いているので通勤が便利だ。
She works in the city center, so her commute is convenient.