Hannah Blake fired the ball past PNG’s keeper Faith Kasiray to find the back of the net and open the scoring in the 16th minute.
It became 2-0 when Samantha Tawharu slotted another past Kasiray off a pass from Emma Main.
The home side struck twice in additional time to bring the score out at 4-0 at the break.
The floodgates opened up in the second half of the match with the Kiwis scoring another eight goals in what was a lopsided affair.
PNG’s second match will be on Friday against New Caledonia. This match will start at 12:30pm (10:30am PNG time).