Rinse the rice thoroughly before cooking. Then cook it in a rice cooker or let it swell in the pot using the swelling rice method.
For the marinade, measure all the ingredients and warm up a little in a small pot. Do not bring to the boil!.
As soon as the rice is completely cooked, remove from the stove into a bowl and pour the marinade over it. For the sushi, place a nori leaf on a bamboo roll mat and place a portion of rice on the bottom half until the algae leaf is covered.
Place the tuna on top and season with wasibi or honey if desired. Now form a roll. Make sure that the rice is firmly attached to the fish.
Moisten the protruding piece of nori leaf slightly with a little water. After rolling, leave to rest for a few minutes and then cut into 7-8 rolls. Mix the sauce ingredients and season to taste with a little pepper.