Seven schools - Te Kura Kaupapa Maori o Wairarapa, Opaki School, Douglas Park School, Kahutara School, Lakeview School, Carterton South End School and Chanel Intermediate - fielded 12 players for each game and opened their matches with a haka.
Chanel Intermediate won the tournament and walked away with a carved trophy donated by Nathan "Chopper" Couch, Masterton police constable and former Wairarapa-Bush player.
Lakeview School placed second, Mr Howie said, with Kahutara School third and Opaki School fourth.
Ki-o-rahi is played across New Zealand by both adults and children, Mr Howie said, after earlier being introduced and spread through Europe by the 28th Maori Battalion during World War II.
There is a national New Zealand contest for adults in the sport, which has been undergoing a resurgence in popularity at home since the late 1970s, he said.
Tournaments were also played in Auckland and Wellington and internationally in Italy and France, where a world cup in the sport is contested, Mr Howie said.
The tournament for primary schoolchildren partnered Sport Wellington Wairarapa, Whaiora Whanui and Rangitane o Wairarapa.