Begin by cubing your chicken thighs into bite-sized pieces.
In a large skillet or wok, heat the olive oil over medium-high heat. Add the cubed chicken thighs and sauté for about 5-7 minutes, until browned and cooked through.
While the chicken is cooking, combine the water, low-sodium soy sauce, honey, pineapple juice (if using), brown sugar, garlic, and ginger in a medium bowl. Whisk until the sugar is dissolved.
Once the chicken is cooked, pour the teriyaki sauce over the chicken in the skillet. Stir well to coat the chicken evenly.
In a separate bowl, mix the cornstarch with cold water until smooth. Pour this mixture into the skillet and stir continuously for about 2-3 minutes until the sauce thickens and becomes glossy.
Remove the skillet from the heat. Your Easy Teriyaki Chicken is now ready to be served!