(こくご)

こくご
noun
national language, Japanese (subject)
1. national language
The official language of a country.
Japan's national language is Japanese.
That country has two national languages.
In Canada, English and French are established as the two national languages.
2. Japanese (school subject)
The subject of Japanese language arts in school.
Japanese language class.
国語(こくご)辞典(じてん)
Japanese dictionary (monolingual).
国語(こくご)得意(とくい)
I'm good at Japanese (subject).

国語(こくご) means "national language." In Japan, this specifically refers to the Japanese language, especially as a school subject.

COMMON COMPOUNDS:

AS A SCHOOL SUBJECT:
国語(こくご) is one of the core subjects in Japanese education, covering reading, writing, grammar, and literature. It is equivalent to "Language Arts" or "English" class in English-speaking countries.

CONTRAST: