Pursuing a Language in College

Japanese is useful for leisure but not for business.

That all depends on what you're looking to do in life.

For instance, let's say I want to work in the video game industry. Quite a large portion of video games are produced in Japan, so I would want to become a translator for a Japanese game company and do localizations for my own country. You can be paid quite a lot of money doing that and that's just one of the smaller things you can do if you're fluent in both or are a native in English (Usually, they want native English speakers more than people who've learned it).