It also guarantees the Black Sticks at least a place in the bronze medal match while they still have a chance to make the final if results go their way on the last day of round robin.
Head coach Darren Smith said it was good to secure the second win in a row at the tournament thanks to a solid performance.
"We have guaranteed ourselves a chance for a bronze medal but will be putting everything on the line in our next game against Great Britain to give a good run at making the final," he said.
"I thought we played well in defence today - we were fluid and tackled very effectively while our penalty corner defence kept them off the score sheet.
"We will rest our bodies as much as possible now and prepare for a tough match up against Great Britain who are playing really well at the tournament."
The Vantage Black Sticks play Great Britain in their final round robin match at 8:00pm Friday night (NZT), with live coverage on SKY Sport 4.
In today's other matches India defeated Japan 4-3 in a high scoring contest while Australia snuck past Great Britain 2-1.