Commission chairwoman Anne Tolley said the council would not tolerate racist behaviour in the spaces it administers on the community's behalf.
"This is not who we are, or who we want to be.
"Over the last year we've heard loud and clear from our communities that creating an inclusive and vibrant city is important to them, and I know the majority of our community will be just as sad as we are about this act of mindless vandalism."
Work is underway to scope the cost of repairing the signs, which will be restored as soon as possible.
Additional signage and cultural touchpoints will continue to be installed throughout 2022/23.
Mauao historic reserve is owned by local iwi Ngāi Te Rangi, Ngāti Ranginui and Ngāti Pukenga in the form of the Mauao Trust. The reserve is managed jointly by the Mauao Trust and Tauranga City Council under the direction of Ngā Poutiriao ō Mauao.
Police confirmed they have received a complaint about the incident and encouraged anyone with information to contact them via 105 and quote file number 220825/1252.
Alternatively, information can be provided anonymously via Crime Stoppers on 0800 555 111 or www.crimestoppers-nz.org.