If Japanese wasn't such a time sink I would probably study German too. Most of my ancestors were either German or German speaking Swiss people, so it'd be cool it too. The problem is all of the dialects. There are over 200 the last time I checked. Thankfully most German speakers can speak standard German, so it wouldn't be a big deal or anything. Maybe when I'm fluent in Japanese in roughly two decades I can start learning that language too.