When people discuss Japanese interest in Western Culture the talk is often of American Country Western music, films, bourbon, Christmas and commercialism. But that isn't all of it. I haven't been to Japan but I suspect they are like other humans and are attracted to what is interesting, unique and beautiful in other cultures. And of course, as you might guess, we are talking specifically about tango in this case!
Check out the Japanese tango site Tango Cabeceo
There are classes, milongas and more. The site is run by Kazuko Taniguchi, who discovered the tango while living in the USA in 2004. She was so enthused she went to Buenos Aires a month later. Two years later she went and stayed for six months. Her aim was to become a milonga dancer.