also: インナーシティ
noun
inner city
Refers to the central, often economically disadvantaged, residential area of a large city. Used in urban studies and social contexts.
インナーシティーの再生プロジェクトが始まった。
The inner city revitalization project has started.
彼はインナーシティーの問題について研究している。
He is researching issues of the inner city.
都心 refers to the city center or downtown area in general, often with a focus on business and commerce, while インナーシティー specifically connotes the older, often poorer residential districts surrounding the central business district.
Borrowed from English 'inner city'.