Compared to Sheffield I mean. There's a few that are the same, but Sheffield generally do have better universities I think. Though anyone at Sheffield, feel free to correct me.
Hmm, Sheffield don't have theirs on their site. I'll go look in the booklet; here we are, Sheffield's (I don't have time to include the macrons I'm afraid):
International Christian University
Kyoto National University
Otaru University of Commerce
Yokohama National University
That lists starts off with "...inlcude", so maybe there's one or two more.
From looking at that, it seems the partner Unis are better.