When did Kakao Bank start offering accounts to foreigners with ARCs? Last I checked it did not.
Suffice it to say: for foreigners without a Korean ID number it’s a definite no and with a Korean ID it’s a likely no.
And good news: they’re not called “ARCs” anymore. No more “Alien Registration Card” extraterrestrial stigma. Now it’s just the regular stigma.
However, I have yet to read that any of the online banks have changed their procedure to take advantage of these changed regulations.