Japanese is a small language and it is not difficult to learn. Some people can learn Japanese well in a year, and all of them have passed the first level. Working in Japan, most people are engaged in foreign trade. Even if they learn Japanese well, the most they can do is translate in a small company. At the same time, they will learn English well or learn more small languages, and then your life will be worry-free.
Some people have never learned Japanese. As long as they watch more Japanese cartoons, they will naturally pass several levels, and there are many Japanese training schools that do not belong to regular universities. I really don't recommend that you only study Japanese in college, or take Japanese too seriously. You are not a linguist.
Learning languages is generally foreign trade and translation, depending on which job you like. I hope my words are helpful to you.