While it is not as popular or common as English in Japan, there are a number of people who want to learn the language. Finding a school to teach at may prove to be somewhat difficult but they are here.

I guess Japanese are more inclined to learn English, or other European language. Japanese preferred to use their own language and that is admirable. They can trade all over the world just using their own language. Why don't you try, they might also interested.

Yes, well spotted!!
I believe there are one or two native Spanish speakers in -- Spain, for instance.;)