This cultural assessment summarizes a study on preventing suicide among Māori in New Zealand. The study investigated over 700 cases of Māori suicide and self-harm annually. It formed an investigation team and advisory group to design a randomized controlled trial comparing a culturally-informed intervention ("Powhiri") to treatment as usual for Māori presenting with self-harm. Powhiri incorporated elements of Māori culture and problem-solving therapy. Preliminary findings showed Powhiri significantly decreased hopelessness and increased time before re-presentation with self-harm compared to the control group. The assessment calls for continuing to improve Māori cultural identity through culturally-informed problem solving interventions.