Many of the shops have free samples available but if you are more hungry, there are many stalls where you can grab a couple of grilled yakitori skewers or other snack foods to eat on the fly. There is a good chance that the sight and smell of all that amazing food will set your stomach rumbling and there are plenty of larger restaurants where you can sit down and satiate your cravings.
While it is predominately a food market, there are also some old and quite famous shops selling knives and cookware, and even the occasional souvenir shop to cater to the ever increasing numbers of tourists coming to try the local delicacies.