Place the chicken breasts in the bottom of the slow cooker in a single layer.
In a small bowl, whisk together the minced garlic, grated ginger, soy sauce, and honey until well combined.
Pour the sauce over the chicken, turning the breasts so they’re evenly coated.
Cooking
Cover and cook on low for 6–7 hours or on high for 3–4 hours, until chicken is fully cooked and pulls apart easily.
Remove the chicken to a cutting board or shred it directly in the slow cooker with two forks.
If you remove it, return the shredded meat to the sauce and stir so the sauce soaks into the chicken.
Serving
Serve the shredded teriyaki chicken over warm cooked rice and sprinkle with sliced green onions if desired.
Notes
If you prefer thicker sauce, reserve a small amount of the cooking liquid and thicken later with cornstarch and water on the stovetop. For a gluten-free version, swap soy sauce for tamari or coconut aminos.