Hakata fills a culinary gap in the area where there are few other restaurants. Most of the people coming to the restaurant either work in the nearby area or are high school students at a nearby school. In general the food, a mix of Japanese and Brazilian, is quite good and reasonably priced. There is some variety in the food over different days of the week which means you can get at least something different most days you go there.
Getting a drink, particularly something that is not our of a can or a bottle, however, takes some time, and as a result a lot of people forgo getting something to drink with their lunch..
Another drawback is the line to pay the bill, something that seems fairly common at many buffet restaurants in Brazil. Only two people are able to take cash for the meals served, and this means often having to wait in line for at least 10 minutes after lunch to pay your bill. Speeding up this process would go a long way to improving the overall experience of lunch.
Overall a fair option for the money. Nothing extraordinary, but not bad either, and at a fair prince.