sorry for the double post but I HAD to add to this.
There are a bunch of these students at Kobe. They are from all over and usually in the hard sciences. They came to be their supervisor's slaves - they work 10hr days 6 days a week in their supervisor's lab doing HIS (almost always a man) experiments. The supervisor tells them to skip the language classes and come straight to the lab so he can get the most out of them (read: the most free labour). Most of the students with an actual interest in the language find this to be saddening, but some (usually from developing countries or some hardship) are just happy to be away from home it seems.
Some, however, have seemingly drank the kool-aid. "I have google so I don't need Japanese." It's gonna be a long, tedious, lonely life here until they finish their PhDs and take off. Avoid these types at all costs.
I reply to everyone in Japanese. It's a bit cold but I don't have time to make friends with people (Japanese, European, etc) looking to practise their English with someone from North America. I came here for a reason.
/rant