FBAR reporting needed for IBKR now?

I'm sorry if this is a dumb question or if it has been covered already. I searched but couldn't seem to find an answer about this particular topic.

It's my understanding that FBAR reporting has been unnecessary in the past because IBKR was US based. But since everything changed over to Interactive Brokers Japan, does that now mean that FBAR reporting is necessary? Or is it okay because IBKR is still an institution based in the US and IBKR Japan is under the overall IBKR umbrella?

This is probably super obvious but I'd really appreciate advice. Thank you!