developed country; advanced country
Refers to a country with a highly developed economy, infrastructure, and social systems; often used in political, economic, and social discussions.
Japan is considered one of the developed countries.
In developed countries, population aging has become a major issue.
This country became a developed nation through rapid economic growth.
The country finally joined the ranks of developed nations.
The standard of living in this region is comparable to that of developed countries.
As a developed country, Japan is focusing on international cooperation.