If I had the chance I would definitely go to Osaka again - the place is great as it is close to cultural places such as Kyoto and Nara and the big metropolitan city of Osaka.   My host family were definitely the highlight of the trip as I am in still in contact with them now, but the university itself was dire.  Kansai Gaidai University wasn't very good in terms of actually improving my Japanese - the language lessons were only 50 minutes a day for spoken language learning and 3x 50 minute lessons a week for writing. The 'big international section' they boasted about was solely for the Japanese students, as all of the foreigners were put together, and with more than half being American and a great number of the rest being Australian it meant that there were a great number of lazy English speaking students around who did not use their Japanese, if they even were able to speak it, on a daily basis.   The highlight though was being able to stay with a host family. As they didn't speak English, I was forced to use my Japanese and because of them I learned more Japanese and experienced more of the Japanese culture.