These small dishes set are designed by associated process between sushi and soy source. The motif is four different sushi and the lids are simplified with these four sushi.
The dishes are not only for soy source also for a variety of spices and sauces. The lids can be used as chopstick rests. If you do not use this set as chopstick rests and small dishes, you can also put on a table to bring a wit.