01 - Place chicken thighs in the bottom of the slow cooker.
02 - Whisk together soy sauce, honey, ketchup, rice vinegar, sesame oil, garlic, ginger, and red pepper flakes in a medium bowl. Pour evenly over the chicken.
03 - Cover and cook on low for 4 hours until chicken is tender and cooked through.
04 - Remove chicken from the slow cooker and shred or cut into bite-sized pieces.
05 - Mix cornstarch and water in a small bowl until smooth. Stir into the sauce in the slow cooker.
06 - Return chicken to the slow cooker, stir well, and cook on high for 15-20 minutes until sauce thickens.
07 - Serve over steamed rice. Garnish with sesame seeds and green onions.