Through his lawyer, Cannon pleaded guilty to one count of drink driving causing death and four counts of drink driving causing injury.
After the hearing, Cannon and his lawyer, Val Nisbet, turned to the family in the gallery, and Nisbet expressed Cannon's remorse to them.
He said Cannon had read the victim impact statements, and that he wanted to say, being from Ireland, that an Irish family would not have shown so much forgiveness to him.
Tuiano's family had been celebrating a birthday hours before the tragic accident.
Family earlier described Tuiano as a loving father to his two young children, a keen league player, and a man of faith.
"Everybody who knew him - he'd just meet someone and automatically they were brothers," sister Seta Tuiano said.
"My brother lived by the motto: 'Live life to the fullest, but always trust in God and always have faith'."