One of the most popular fresh seafood one-bowl donburi dishes, kaisendon consists of thinly sliced, assorted raw seafood called sashimi laid over freshly steamed rice. What kind of sashimi will be used in a kaisendon dish is not fixed, but the seafood selection depends on both location and season, and most often includes maguro (tuna), tai (sea bream), ama ebi (deep-water shrimps), hotate (scallops), uni (sea urchin), kani (crab), and sometimes even marinated ikura (salmon roe).
Apart from sashimi, kaisendon is typically topped with toasted nori seaweed, myoga ginger, shiso or Japanese basil, cucumber, onions, and either fresh or pickled ginger. Before being placed on a bed of steamy rice, all of the ingredients are drizzled with wasabi-laced soy sauce, and the kaisendon bowl is lastly garnished with some white sesame seeds, white radish sprouts, and wasabi paste.