Pour the soy sauce and mirin into a small bowl. Add the sugar, sesame oil, gochugaru, and lime juice and whisk to combine. Set aside.
Place the corn in a small saucepan. Add enough water to just cover the corn. Place the pot over medium heat and bring to a boil. Reduce to a simmer and cook for 2 minutes or until the corn is tender.
Drain the corn and place it in a medium-sized bowl. Add the butter, miso, and honey and stir until the butter and miso melt and become well-integrated. Set aside
Divide the tofu pieces across four bowls. Add two iceberg wedges to each bowl followed by 4 tomato wedges, 2 avocado wedges, and two heaping spoonfuls of the corn. Drizzle the dressing over everything in the bowl and garnish with scallions, nori, and sesame seeds. Serve immediately.