The voting result will be officially ratified at this year's rūnanga AGM.
Tau acknowledged Dearlove's election campaign and the Hauāuru Takiwā.
"I want to say thank you to my takiwā for their continued confidence in me," Tau said in a statement.
"I ran a positive campaign and I am proud that our takiwā responded the way they did. I have never taken my position for granted, and I look forward to continuing to work hard for Ngāpuhi."
Tau has been unopposed as the Hauāruru trustee for many years.
Toki said Te Rūnanga-Ā-Iwi O Ngāpuhi holds statutory responsibilities representing Ngāpuhi under the Maori Fisheries Act 2004, the Maori Commercial Aquaculture Claims Settlement Act 2004 and the Resource Management Act 1991.
As the mandated iwi authority for Ngāpuhi, it leads the spiritual, social, cultural, environmental, and economic growth for all Ngāpuhi and builds enduring relationships and creates opportunities to help realise Ngāpuhi's collective interests, dreams and aspirations.