Do they actually, though? Isn't at least the massive majority of Niji's management (even EN) inherently Japanese? I'm not aware of their corporate structure (stop the presses), but part of the reason for the KR/ID merge was so that they report directly to the JP management as leaving KR to do its own thing ended up being a shitshow, wasn't it? The only manager that I'm pretty sure is known probably not to be inherently JP is Noor, and who knows whether she/they're still in the company.