If there is no Japanese in the school, you can apply for self-learning Japanese, which is also allowed. If the school has a Japanese major, it is still possible.
Send a teacher to teach you.
English is still the mainstream language, and a few schools also offer Japanese, which is also related to the increase in the number of Japanese in the college entrance examination.
Here we should distinguish between public foreign languages and foreign language majors. Public foreign languages are for everyone to learn, and each class will be taught by a teacher. foreign language
A major is a major in a university, and only people with this major can learn it.
For example, the public foreign language is English, and the school also has a Japanese major. Japanese teachers only teach Japanese majors, and other majors still need to be taught.
Learn a foreign language-English.