Gather all the ingredients for your chicken teriyaki pineapple bowl. Preheat the oven to 350°F and line a baking dish with foil.
In a bowl, mix the rice vinegar, salt, sugar, and water. Add the cooked sushi rice and gently mix until combined, then set aside.
Add all the teriyaki sauce ingredients to a pan over medium-low heat. Stir to combine, then bring to a simmer and cook until the sauce thickens.
Rinse the chicken and pat it dry. Cut it into bite-sized cubes, then coat evenly with the teriyaki sauce.
Arrange the teriyaki chicken cubes in a single layer on the prepared baking dish. Bake for 15 to 18 minutes, or until fully cooked.
While the chicken cooks, mix all the dressing ingredients in a small bowl and set aside.
Assemble the chicken teriyaki pineapple bowls by starting with a layer of rice. Top with the chicken, pineapple chunks, cucumber slices, carrot slices, onions, and edamame.
Finish each bowl with the dressing, then sprinkle green onions and sesame seeds on top. Serve immediately and enjoy!