Preheat the oven to 400°F (200°C). Line a baking sheet with parchment paper.
Season the cubed chicken with 1/2 teaspoon salt and 1/4 teaspoon pepper.
Place the beaten eggs in a shallow plate and the panko breadcrumbs in a second shallow plate.
Dip each seasoned chicken cube into the beaten eggs, letting excess drip off, then coat thoroughly in panko; place on the prepared baking sheet in a single layer.
Bake the breaded chicken for 20–30 minutes, until golden brown and cooked through (internal temperature 165°F / 74°C).
While the chicken bakes, combine honey, Sriracha, 3 tablespoons low-sodium soy sauce, 1 tablespoon dark soy sauce, molasses, five-spice powder, and minced garlic in a small saucepan; bring to a boil over medium-high heat.
Reduce heat and simmer the sauce 2–3 minutes, stirring occasionally, until slightly thickened.
Transfer the cooked chicken to a large bowl, pour the warm sauce over it, and toss until each piece is evenly coated.
Garnish with chopped chives and sesame seeds, then serve immediately.