[2] The approximately 24 members attended Kura Kaupapa Māori (immersion schools),[3][4] and many are Ngāti Porou, while all have strong ties to te Tairāwhiti.
[1] Ka Hao first performed in October 2019 as a part of the Te Tairāwhiti Arts Festival.
[5][6] In January 2020, the group released a live album of gospel waiata in te Reo, as a part of the supergroup Mōhau.
[7] Ka Hao released their debut single "35" in September 2021, a song that references State Highway 35.
[9] Ka Hao were later featured on one of the singles preceding singer Rob Ruha's album Preservation of Scenery.