The move was announced Tuesday, with the 28 year-old scheduled for a medical in January with his new club.
Bozanic becomes Pohang's second foreign-born player, joining Brazilian defender Rafael Berger.
The midfielder made 15 appearances across all competitions with Ventforet, scoring one goal, having spent the previous two seasons with Melbourne Victory.
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Bozanic has made 13 appearances for the Socceroos, last featuring in the nil-all draw with Macedonia in 2015.