The Indian scorers were Arjun Halappa (10th minute), Tushar Khandker (45th) and Shivendra Singh (60th), while Korea scored through two penalty corner strikes by Nam Hyun Woo in the 12th and 70th minutes.
India began aggressively mounting onslaughts with central midfielders Arjun Halappa and Vikas Pillay setting up wingers Mandip Antil and Tushar Khandker who penetrated and split the Korean defence.
They earned the first penalty corner in the fifth minute after Halappa found the foot of Korean captain and sweeper Lee Nam Yong.
However a second penalty corner followed as a defender charged straight at the Indian flicker Mahadik. But on this occasion Antil failed with the Korea goalkeeper Lee Myung Ho out of charge from the indirect.
The Indian onslaughts finally paid dividend in the 10th minute as Halappa combined with Shivendra Singh drawing out and wrong footing custodian Myung Ho before the former slotted home.
The Koreans retaliated immediately stepping up the pace with swift run downs and off the ball play and won their first of ten penalty corners when Nam Hyun Woo sank a picture perfect dragflick past Bharat Chetri in the top left in the 12th minute to draw parity.
India were awarded a series of opportunities in the form of seven penalty corners but the defending champions failed to convert any of them.
Dhananjay Mahadik not only lacked the power for the set pieces but was also devoid of imagination for indirect variations. Surprisingly the second dragflicker, Lucknow youngster Amit Prabhakar was not given any try.
India wasted two more chances to break back into the lead as first Shivendra pushed wide followed by Tushar Khandker being off target.
India were also lucky not to go into half time with a deficit as Vikas Pillay brought off a brilliant goal line save from a penalty corner.
India commenced the second half with more conviction and commendable ball rotation and could have taken the lead soon but Bharat Chikara pushed straight to the goalkeeper after being set up by captain Rajpal Singh.
However, shortly after Khandker delicately deflected into the Korea goal in the 45th minute from Shivendra’s cross to put India ahead once again.
India further increased the lead to 3-1 in the 60th minute when Danish Mujtaba unleashed a rasper from the left to Man of the Match Shivendra and he did not disappoint.
The Koreans attacked unrelentingly in the final few minutes and Nam Hyun Woo got them the second goal at the stroke of full time.
India, who started with a 1-1 draw against China before beating Pakistan 4-2, have seven points from three matches, while Korea have three points.
India will next challenge world champions Australia on Monday.