 In May 1891 in Waipawa he gave evidence to the Native Land Laws Commission, pointing out that great injustices had resulted from laws imposed on Māori by the European-dominated Parliament, and asking that Māori be allowed to make their own laws.This request reflected Tomoana's growing involvement with Te Kotahitanga, the movement for an independent Māori parliament.Hāmiora Mangakāhia, several times premier of the Māori parliament, credited Tomoana with being one of the principal agents of its establishment.