Soy Marinated Tuna Rice Bowl

Slice a tuna fillet into about ¼ inch thick slices. Mix soy sauce and mirin and reserve 2 table spoons of marinade, set aside. Marinade sliced tuna in the remaining marinade for 30 minutes.Fill a bowl with rice. Pour 1 tablespoon of the reserved marinade and sprinkle shredded shiso leaf over rice. Place marinated tuna slices, cucumber slices, a shiso leaf, and an egg yolk on top. Garnish wasabi, toasted sesame seeds, shredded nori seaweeds.