He began surfing aged 8 and already has an impressive list of achievements to his name.
This winter he captained his Te Puna under-11 team to the Western Bay 15-a-side and 7-a-side titles, as well as leading the Ellis Shield under-11 boys' rep team to the Bay of Plenty title.
James was a key player in the St Mary's over-40kg 7-a-side team that took out the Western Bay title. His older brother Lee, 14, is also a top-class surfer, ranked second in New Zealand at under-14 level.
Their father Barry Ririnui, who represented the Bay of Plenty Steamers and NZ Secondary Schools as a top-quality midfield back, says the sibling rivalry spurs both boys on.
"Lee gives James inspiration, companionship and good, old-fashioned sibling rivalry out in the water," he said.
"Being involved with a great family-based group of surfing friends has added to James' enjoyment and passion for the sport of surfing."