I would have never expected to see food stalls in Japan. I know there are food stalls in festivals and such, but this yatai spots in Fukuoka is a different experience. Definitely, try the famous Hakata ramen! It's one of the best ramen styles I've ever eaten in Japan.
These little food stalls are amazing. Not only do they sell delicious food and serve great beer, because they are so small, they are a great place to have a chat with some of the locals and enjoy a warm summer evening along the river.