new town; newly built part of a city
Refers to a newly developed area of a city, often contrasted with the old town (旧市街).
See also: 旧市街
この新市街には、おしゃれなカフェがたくさんある。
There are many stylish cafes in this new town.
旧市街と新市街では、街の雰囲気がまったく違う。
The atmosphere is completely different between the old town and the new town.
旧市街 is the old, historic part of a city, while 新市街 is the newer, modern district built later.
Compound of 新 (new) + 市街 (city streets/urban area).