<p>Learning Japanese will be much harder after college. If you’re interested in it I highly suggest you learn as much as possible while in college. Also, when you graduate you will have to make an effort to retain it and practice it occasionally or you WILL lose it.</p>
<p>It will help you a bit. A very small number of Japanese companies targeted my school to try to recruit Americans EEs for jobs in Japan. Knowledge of Japanese was not necessary but was, obviously, beneficial.</p>