If you have to be a special student, music, art and so on, you can't learn small languages. Small foreign languages are the choice of key classes, especially long classes, ordinary classes and parallel classes.
I suggest you, in fact, learning small languages is of little use to high school students, but you can be interested. If you want to take the college entrance examination for small languages, it is more important to do a good job in culture and your professional courses. In recent years, the national education policy has made a decision to gradually abandon the small language single move in the college entrance examination. The future of the college entrance examination depends on the results of the culture class.
If you really like Japanese and want to work in Japanese in the future, start learning English and your culture class from now on, especially besides the language. In this way, we will have the opportunity to apply for language universities in the college entrance examination, and language universities have higher requirements for English.
Small languages in high school can be learned, but not learned. In short, the small language in high school will not help you much in the future, and culture class is the last word.