In the first quarter, Naomi Carroll had the ball in the net but it came off the back of her stick and was disallowed.
Niamh Carey was denied by a good save and McLoughlin saw her effort from a penalty corner hit the post.
However, she wouldn’t miss given a second opportunity. McLoughlin’s shot found the corner of the South Korean net to give Ireland the second quarter lead.
It would be a nice variation from another corner just before half-time that would see the Irish double their advantage.
Elena Neill, on her 150th appearance for Ireland, found Hawkshaw, who deflected the ball into the backboard.
While a world-class save from Kim Eunji stopped Carroll from adding to the lead in a scoreless third quarter, there was nothing the goalkeeper could do about the third Irish goal.
A loose ball in the circle broke perfectly for Mullan who hammered it into the roof of the net on her reverse stick.
A confident performance was completed with the final play of the game as Upton’s drag flick from a penalty corner found the bottom corner.
