They are located in the food court of TNT Supermarket. I was hesitant. I had the Hiroshima Okonomiyaki and I thought it was DELICIOUS! My husband had the regular Okonomiyaki and he loved it too. Great prices for great food. Better than the Okonomi House (which we tried the next day, and had to go back to this place the day after).
The only downside is, they are a bit slow. It is probably because some of the food takes awhile to make, which is totally understandable, but they do not take orders until they are ready, even if they see you waiting. So make sure you go earlier than you want to eat. I absolutely hate waiting, but I will wait because it is that good. :)