Rinse 1 cup uncooked short-grain rice, cook it, and season with rice vinegar, sugar, and salt. Let it cool.
Combine soy sauce, sesame oil, rice vinegar, honey, ginger, and garlic. Add cubed tuna and marinate for 5-15 minutes.
Slice avocado, cucumber, radishes, and carrots. Set aside.
Add seasoned rice to each bowl. Arrange marinated tuna and toppings in sections. Add sesame seeds, nori strips, and sauces.