The event, organised by Dokan chief instructor Kevan Mitchinson, took place at the Temple Park Centre, South Shields.
Mr Mitchinson said: “The whole aim of the event was to give young children an opportunity to compete.
"I’ve always believed that ‘grassroots’ karate is important to get youngsters and new starters involved in the sport and decided to put on an event with categories aimed at them."
He added: “We had over 250 competitors from 18 clubs competing on five competition areas non-stop from 9.30am to 4.30pm on the day.
"Dokan had 80 students competing, ranging from some complete novices and others who have been competing nationally for a decade or more.
"I am really pleased with how the event went. It made a lot of kids and some adults very happy.”
Mr Mitchinson’s students made the most of a rare ‘home fixture’ – winning 36 gold, 29 silver and 40 bronze medals.
He added: “The day could not have been better and the whole Dokan team came together to help out.
"Three vans were required to get the equipment there, supplied by the dads of students, and a small army of volunteers turned out to helped us set up and pack away and do all kinds of jobs in between.
“They all played a major part in making the day a success. It was a day to highlight the best in karate and public spirit. I have never been prouder of Dokan.”
The Dokan Karate Association runs classes – for all age groups and levels – at Whitburn Parish Hall, All Saints Church, Cleadon and Redhouse Community Centre, in Sunderland.
The club, which was established in 2009, practices traditional Shotokan Karate and regularly sends teams to competes at events all over the country.
For more information, go to www.dokan.co.uk or call 07939130411