Place the chicken thighs in your crockpot.
In a medium mixing bowl, combine the pineapple juice (about 1 cup), ketchup, brown sugar, soy sauce, minced ginger, and minced garlic. Whisk the sauce ingredients until they are well mixed.
Pour the prepared huli huli sauce over the chicken in the crockpot and cook.
For low heat: Cook on low for 6 to 8 hours.
For high heat: Cook on high for 3 to 4 hours.
Once the chicken is cooked, use tongs or a slotted spoon to remove the chicken from the crockpot and set it aside in a bowl. In another small bowl, mix the cornstarch with 2 tablespoons of cold water to form a slurry. Using a wooden spoon, stir the slurry into the sauce in the crockpot until it thickens.
Using two forks, shred the chicken you placed in a bowl.
Return the shredded chicken to the crockpot and stir it into the thickened sauce until it's well coated.
Serve your slow cooker huli huli chicken over a bed of fluffy white rice. Feel free to garnish the chicken with chopped green onions and sesame seeds. Enjoy!