The iwi consists of the descendants of Tamanuhiri and his two principle wives, Rongomaiawhia and Hine-nui-te-po (formerly a wife of hid neighbour Tawake-whakato).
[4][5] The rohe (tribal lands) of Ngai Tamanuhiri are located to the south of Poverty Bay in the Gisborne Region of New Zealand.
TTPT was established under The Ngai Tamanuhiri Deed of Settlement Act 2011[9] to manage the tribal redress and assets after the settlement of historical Treaty of Waitangi grievances with the crown The Tamanuhiri Tutu Poroporo Trust's Governance structure consists of a single board of seven members, each of Ngāi Tāmanuhiri descent.
TTPT represents the interests of its beneficiaries during issues concerning resource consent under the resource consent act[7] The tribal area of Ngāi Tāmanuhiri is with the territory of Gisborne District Council, which performs the functions of a district and regional council.
[7] Turanga FM is the radio station of Turanganui-a-kiwa iwi, including Ngai Tamanuhiri, Rongowhakaata and Te Aitanga-a-Māhaki.