The new Gunners forward capped a big week with his first ever international treble as the Taeguk Warriors started their campaign towards Brazil 2014 in fine fashion
New Arsenal signing Park Chu-Young was the star of the night with a hat-trick, while Sunderland's Ji Dong-Won grabbed a brace and Sangju Sangmu midfielder Kim Jung-Woo grabbed the other.
Korea dominated the contest from the outset and it only took eight minutes for skipper Park to put his side ahead with a sliding finish.
The new Arsenal forward doubled Korea's advantage on the stroke of half-time when he headed in a corner.
Lebanon rallied early in the second stanza to hint they could respond on the scoreboard, but Ji put the result beyond doubt on 66 minutes, sweeping home from a low ball.
Barely a minute later Park completed his hat-trick when he drilled home a fine shot before falling to his knees in celebration of his first ever international treble.
On 83 minutes, Lee Keun-Ho's cross found the unmarked Kim who easily tapped home from close range to make it five.
A minute later, Ji grabbed his second to make it 6-0 with a fine finish after Kim's sublime lofted throughball.
Kim may have made it seven when his late long-range strike hit the post, but the margin was healthy enough for Korea to celebrate a successful night.