Start by combining jasmine rice, coconut milk, water, salt, and sugar in a rice cooker or on the stovetop. Let it cook until fluffy and creamy. Fluff with a fork before serving to keep it light.
Mix rice vinegar and a pinch of sugar in a bowl. Toss thin cucumber slices and let them sit while you cook the salmon. This adds a crisp, tangy contrast to the rich salmon.
Preheat the oven to high broil (around 550°F). Toss salmon cubes with avocado oil, tamari, garlic powder, ginger powder, sesame seeds, and optional nanami togarashi. Spread on a baking sheet and broil 6–8 minutes until just cooked and lightly browned.
In a small bowl, combine mayonnaise, sriracha, and lime juice. Adjust the heat to your liking. This adds creaminess and a zesty kick to your bowl.
Divide coconut rice among bowls. Top with pickled cucumber, broiled salmon, and avocado slices. Garnish with furikake and chopped chives. Drizzle spicy mayo on top and enjoy immediately.