Consumer prices in South Korea were up 1.9 percent on year in September, Statistics Korea said on Friday.
That exceeded expectations for 1.5 percent and was up from 1.4 percent in August.
On a monthly basis, inflation was up 0.7 percent, beating forecasts for 0.6 percent and up from 0.5 percent.
Core inflation, which excludes volatile food costs, advanced an annual 1.2 percent. That's up from 1.0 percent in the previous month.