Are you meaning that you will come here on a cultural visa?
And you need to find an expert in some field to teach you something uniquely Japanese?

Because... I believe you already need to have experience in something before you come..
for example, I know potters from England who came here to study old Japanese pottery techniques...
but they had studied pottery seriously for many years...

I believe that is a prerequisite for the cultural visa.
Were you told something different??