Cook the rice in the rice cooker and let it cool down.
Connect two sheets of nori to make one larger sheet. A drop of water can glue the nori sheets altogether.
Put vinegar, salt, and sugar on the rice.
Mix well using a wooden spoon, then set aside.
Spread the rice evenly on the nori sheet.
Put a line of chipotle sauce in the center of the rice and a line of ginger guacamole next to it.
Spread the carrots, cucumbers, and cilantro evenly on top of it.
Top it off with the tuna.
Gently roll it up. Use drops of water to seal the end side of the nori.
To make it portable, wrap your sushi burrito with aluminum foil or paper.