He and Fonua were involved in the biggest methamphetamine haul in New Zealand on Ninety Mile Beach in June last year.
Police seized 448kg of the 494kg of the drug in a campervan at Totara North while the rest was found buried in sand dunes on the beach.
The seizure had an estimated value of $448 million and outstripped the 334kg seized in the country in 2015.
In court yesterday, Fonua requested, through his lawyer Samuel Wimsett, that Justice Kit Toogood defer the convictions until his sentencing on June 2.
Mr Wimsett said Fonua was doing drug, alcohol, and gambling courses while on remand and wished to complete them before he re-appeared for sentencing.
Fonua was remanded in custody and Justice Toogood ordered a pre-sentence report.
Five others before the court — Ulakai Fakaosilea, 26, Jermiah Iusitini 27, Malachi Tuilotolava, 25, Ka Yip Wan, 26, and Stevie Norua Cullen, 34 — pleaded not guilty late last year and elected a trial by jury.
Their trial will likely take place in April next year.
Crown solicitor Mike Smith told Justice Toogood he was not aware of any pre trial applications.
The five men will reappear for a callover on August 3.
Cullen and Lusitini are facing charges of importing meth, possession for supply and participating in an organised criminal group.
Fakaosilea and Wan are charged with importing and possession for supply, while Tuilotolava is facing charges of importing, possession for supply, participating in an organised criminal group and money laundering.