Remove the filling from aged kimchi and slice it into thin strips.
Place a sheet of seaweed on a bamboo mat and evenly spread the rice over it.
Sprinkle a little sesame oil and salt on the rice and mix gently.
Layer aged kimchi, tuna, cucumber, carrot, pickled radish, and egg strips on top of the rice.
Roll the ingredients tightly, gimbap-style.
Slice into bite-sized pieces.