Haw. Rev. Stat. § 583A-202: Exclusive, continuing jurisdiction.

(a) Except as otherwise provided in section 583A-204, a court of this State which has made a child-custody determination consistent with section 583A-201 or 583A-203 has exclusive, continuing jurisdiction over the determination until:

(1) A court of this State determines that the child, the child's parents, and any person acting as a parent do not have a significant connection with this State and that substantial evidence is no longer available in this State concerning the child's care, protection, training, and personal relationships; or

(2) A court of this State or a court of another state determines that the child, the child's parents, and any person acting as a parent do not presently reside in this State.

(b) A court of this State which has made a child-custody determination and does not have exclusive, continuing jurisdiction under this section may modify that determination only if it has jurisdiction to make an initial determination under section 583A-201.