In most of sushi of this type, wasabi (Japanese horseradish), shoga (ginger) or oboro (chopped, cooked and pressed fish or shellfish formed into a solid that is flavored and colored; primarily sold as imitation crab) is inserted between a topping and vinegared rice, or is placed on the topping.
ワサビやショウガ、オボロを間にはさむ（または上にのせる）ことが多い。