After a goalless first-half, the Koreans scored four times without reply to emerge handsome winners in the Azlan Shah hockey match.
India lost 0-1 to Spain, while South Korea thrashed England 5-1 on the opening day of the Rabo Bank eight-nation hockey tournament
Korea's squad for the 12th hockey World Cup in New Delhi.
Koreans decided to give a miss to the tournament, to be held in December, in the wake of Tuesday's twin blasts in Rawalpindi.
New Zealand's win boosted their hopes of reaching the final of the annual tournament in Malaysia.
