They had Soju when I was there last. The Korean market (Asian/Oriental Food Market as per google) near Earthfare does have a larger selection. That market also has pomegranate wine, various sake and Umeshu (Japanese plum wine, very good btw). Ciao!
I think they have one or two bottles (and really good flavored sake), but the asian market on 34th near the earth fare has a much better selection of Korean stuff and Soju...
Ditto what Ken said.
I don't know. They're very helpful though and may know where to find it if they do not carry it.
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