noun
official name of a country; country name
Refers to the formal, official name of a nation, such as 日本国 or 大韓民国. Used in historical and diplomatic contexts.
日本の国号は「日本国」です。
The official name of Japan is 'Nihon-koku'.
歴史の授業で、昔の国号について学んだ。
In history class, we learned about the country names of the past.