This has happened before in Japan. They issue a METV (Multi Entry Tourist Visa) with a 6 month validity and in their opinion you can complete yiur Soft Power programme in 6 months and do not need a 5 year visa.
Couple of pals did this with UK Ltd companies. They were Directors but wrote to themselves as employees saying they worked remotely approving quotes and payroll.
I am sure I looked before and could not open one. I have no UK address so that route is closed off too. I have the account just for transfer of money though, not banking.