noun
sister city; friendship city
A city that has an official cultural or economic exchange agreement with another city, often internationally. Similar to 姉妹都市, but 友好都市 may imply a less formal or broader friendship relationship.
See also: 姉妹都市
京都市とパリ市は友好都市です。
Kyoto and Paris are sister cities.
友好
Conclude a friendship city agreement.