It was all about self-defence and not about confrontation, he said, and many of the children or adults who join a club do so after being bullied.
"It's bully-proof. There's no punching, no kicking. It teaches you how to pin someone and control someone so you don't get hurt and everyone can calm down," he said.
It was the third national tournament held by the Tsunami Southern Tribes Club, which was now spread throughout New Zealand, and the second time it was held in Levin.
"It's a good venue," he said of the Horowhenua Events Centre.
There was a strong contingent from the local Levin club entered, joining other clubs from all over New Zealand.
The tone for the competition was set with a strong opening bout by youngsters Sem Hoftsee and Noah Korau who showed skill and determination.
Entry was by a food donation given to charity. The result was a ute-load of food that was donated to Arohanui Hospice.
The event was sponsored by TRC Toyota, Noel Leeming, Unichem, Pro-Kinetics, Roadhouse and Levin New World.