Natasha Little is currently studying abroad at Waseda University. Here's a little something about her experience.

I live in a dorm on campus, so I don't have the hour or more commute that most homestay students have. It's also in a great area - quiet, but a few minutes by metro to some of the popular parts of Tokyo, and the road from campus to the nearest major station is known for its restaurants and bars. I find it more difficult to practice Japanese than I thought it would be, as I am surrounded by students who, though of different backgrounds, are still usually more comfortable with English than Japanese. It is far too easy to get away with speaking very little Japanese. The full year abroad helps with my language skills; it gives you time to get over the culture shock, get used to the area, and then to hopefully buckle down and practice speaking - a semester is sometimes too short for this.
I would recommend visiting the onsen - the hot springs are amazing in the winter. Go on a day trip with friends to Urayasu or Odaiba if you're in Tokyo, take a break from classes and relax!