The 29-year-old has the option of extending that deal by a further year at Parkhead, if both parties are happy with his performances over the next two seasons.
Du-Ri becomes the Bhoys’ second signing in as many days after Charlie Mulgrew was snapped up from Aberdeen on Thursday.
The right-back spent last season playing for German club Freiburg, but was available on a free transfer after his contract expired.
He played three of South Korea’s four games in this summer’s World Cup in South Africa, missing only the 4-1 defeat to Argentina.
In total, he has accumulated 50 caps for his country since making his debut in 2001.
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