Immigration lawyer can’t handle the process of company registration and real property registration as your agent.
In Japan, only attorney or bengoshi (弁護士) and solicitor or shiho-shoshi（司法書士）can handle these.
Recently, unqualified person was prosecuted because of handling real estate registration in Osaka.
This is the statement of Osaka Solicitor association.
I have both licenses, Immigration lawyer and solicitor, so unlike other immigration lawyers, I can widely help you with your problem, especially when you want to start business here.
Solicitor & Immigration Lawyer
Hitoshi Oishi from Osaka Japan
If you are in trouble about visa, please let me know.