Japanese cuisine is one of the finest in the world. Its a delicious and highly unique cuisine that needs some getting used to at the beginning. Being an island, the food is largely based on sea food and rice.
The most known food is Sushi followed by Sashimi.
Then you have Ramen, Oden and Udon. One unique thing of many restaurants in Japan is they display how the dishes look like in real size outside. It is a way to entice hungry souls to get in.