Born in Stockholm (Sweden), now live in Sapporo (Japan). Hold a Ph.D. in computer science and work with computers during the days, perform magic in a bar during the nights (and weekends, for kids). Also used to teach historical fencing back in Sweden.
Sometimes you see people wearing shirts like this. I am told these people are "otaku", which means more or less "nerd" in English, but has only bad connotations (while nerd can be more positive in English). I have many hobbies that qualify me as a nerd, so I am hoping that Japan will also in time give their nerd words positive meaning :-)