The marae-based wananga (workshops) covered cultural, social, economic, political and environmental leadership.
"It's about bridging the gap, so our leaders don't shy away. Some in te ao Maori (Maoridom) can hold their own on any marae, but struggle in te ao Pakeha (pakeha world). We need to change that," Mr Flavell said.
The development project manager at Te Pumautanga o Te Arawa, Aneta Morgan, said it was about equipping their emerging leaders so they could feel comfortable in any setting.
"Rangatakapi o Te Arawa programme has reinforced to me the importance of working together, as Te Arawa, for Te Arawa," graduate Nelson Meha (Ngati Tamateatutahi, Kawiti) said.
Fellow graduate Kopa Manahi (Ngati Whakaue) said: "This wananga is a necessity to the ongoing growth of Te Arawa leadership and I am committed to its sustainability."
Those who graduated from Te Rangatakapu o Te Arawa programme will make up an alumni group, which will focus on supporting and strengthening the current leadership.
They will also play a role in future leadership programmes.