Nihongo and Kokugo are not the same thing
If you are Brazilian and have children studying at a Japanese school, you may already have this question: What do my children study in the Kokugo subject? Is there a difference between Nihongo and Kokugo? Thousands of children and teenagers, the children of Brazilians living abroad, have problems at school, mainly because they don't have a good command of the language of the country ...