Is South Korea richer than Japan?

Excuse me, I'm a bit curious. I've heard a lot of talk about South Korea and Japan's economies, but I'm still a bit confused. Could you possibly clarify for me: is South Korea richer than Japan? I understand that both countries are highly developed and have strong economies, but I'm just trying to get a better grasp on the relative wealth and prosperity of the two. Could you please help me out with this?