Heat olive oil in a large skillet over medium-high heat.
Add the cubed chicken to the skillet. Cook until browned and no longer pink, about 6 to 8 minutes.
While the chicken cooks, whisk together the soy sauce, water, honey, brown sugar, rice vinegar, sesame oil, ground ginger, minced garlic, and cornstarch in a bowl.
Once the chicken is fully cooked, pour the teriyaki sauce mixture over the chicken in the skillet.
Stir well and let it cook for a few minutes until the sauce thickens and coats the chicken nicely.
Serve the teriyaki chicken over a bowl of fluffy rice, alongside steamed vegetables.
Garnish with sesame seeds and chopped green onions.
Notes
Cooking time can be improved by not overcrowding the skillet.
For a saucier dish, double the teriyaki sauce ingredients.