Tonga and Fiji proved a class above on day one of the Oceania Rugby Junior Trophy in Suva.
The Tonga Under 20s thumped Vanuatu 81-0 while hosts Fiji's young squad amassed 63 unanswered points against Papua New Guinea.
The winner of the Oceania event will qualify for next year's second tier Junior World Trophy in Zimbabwe.
Tonga and Fiji finished fourth and fifth respectively at the 2015 event but only one Oceania berth remains up for grabs because Samoa was relegated from the elite Junior World Championship.
The competition resumes on Tuesday with Tonga up against PNG and Fiji facing Vanuatu.