Also, Japanese who have been abroad defiantly do use it differently. One example is photos. I notice Japanese who have been abroad or have lots of foreign Facebook friends share far more photos than those who haven't.
Perhaps my article overplayed the professionalism of Japanese Facebook account. The accounts I've seen aren't on par with LinkedIn on their focus towards being professional. However, I get the feeling that Japanese Facebook users are much more conscious of what non-friends will think of their account than western users are.