I've been asked many times how to get there after people haven't been able to find it, and walked people to its location, so I figured it's time to make a map.
And if those directions don't help, here's a map:
And if you still can't find it, at this point, just contact me and I'll give you a guided tour.
World Mart really only has Asian food, but a decent selection (for Chungju) from different countries. My favourite offering: dried chickpeas! Other places of note for foreign food: Elim's House (Phillipine goods, located by Emart) and a Chinese store close to the market. Emart itself has a pretty good selection of foreign foods itself, but give the smaller places a shot first.