There are two places; one, called Noside, doesn't allow pictures, but this one does. They're both amazing. Yeah.
This is with my Japanese friend Saito.
How's that for food porn, Zenkimchi?
Personally, I'd give a slight edge to the Okonomi at Noside, though you'll also probably have to wait in line there... but dang, it's good.
This is what Noside looks like
and here's a video about how to find it.