1.In a bowl, mix 2 cups cooked rice with 2 tsp sesame oil, 0.5 tbsp roasted sesame seeds, and 0.25 tsp salt. Set aside to cool.
2.Drain the 150 g tuna. In a bowl, combine it with 1.5 tbsp Kewpie mayo, 2 tsp gochujang, 2 tsp gochugaru, 2 tsp sesame oil, and 1 tsp sesame seeds. Mix thoroughly.