In large bowl, mix sugar, vinegar, garlic, and soy sauce

Stir in ginger, and pepper

Place chicken pieces in slow cooker

Pour mixture over chicken

Cook on low 4 - 5 hours

Remove chicken pieces from slow cooker

Cut into 1-inch bite sized pieces

Strain liquid from slow cooker

Bring to a boil in medium sized pot

In measuring cup or small bowl, combin water and corn starch until dissolved

Stir into boiling mixture

Reduce to a simmer

When sauce thickens combine it with chicken back in the slow cooker or other deep serving dish