As far as I understand, you need special permission from Immigration to do work outside of the scope of your visa (資格外活動許可). But what about work that falls under the same visa? Does it matter where the company is domiciled?
I'm specifically wondering if I could hold a retainer-contract with my previous (US) employer, for IT/software consulting (< 20hrs / week). Would this need special permission from the Japanese employer and/or Immigration?
TIA!
by helaapati