Semester in Japan

So, I'm a fourth-semester psychology student living in Mexico, and I've been thinking about doing a study abroad semester in Japan. I'll be 21 by the time I go (well, barely 21, not sure if that changes anything). My only options are Osaka or Nishinomiya, and honestly, I have no idea which one to pick.

I'm a huge fan of the culture and everything that comes with it, but I've literally never been to Japan in my life. Any tips on which one to choose?

by belatrixlestrangee