D7 assistance for Japanese

Hi, first post here. Really happy to be part of the community.

I am living in Japan and working as a freelance writer.
I would like to apply for the D7 visa with my family, my wife and son.
And I suppose to work at Portugal in the same way as Japan.(earn an income in countries outside of Portugal.)
Can you give me the name of a few companies or lawyers who are the best to work with Japanese to apply for the D7?
I look forward to your reply.

Thank you