South Korea President Moon Jae-in said on Saturday he hopes to see North Korean athletes at next year’s Winter Olympics in South Korea to ease tensions over the North’s nuclear program.

Mr. Moon made the comments during the opening ceremony of the world taekwondo championships in the South Korean town of Muju, where a North Korean delegation led by International Olympic Committee member Chang Ung was also present.

The championships, which will feature a performance by the North Korean taekwondo demonstration team, mark the first sports exchange between the Koreas since the liberal Mr. Moon took office in May.

Mr. Moon has expressed a desire to use the Feb. 9—25 Pyeongchang Olympics to reach out to North Korea, with relations between the two at their lowest point in decades. During his stay in the South, Mr. Chang is expected to meet South Korean officials to discuss cooperation at the Winter Olympics.

“If North Korean athletes participate in the Pyeongchang Olympics, I think it would greatly contribute in realizing Olympic values, which are about bringing humanity together and promoting world peace,” said Mr. Moon.

Participation in Pyeongchang could “provide a turning point for the reconciliation between the South and North,” Mr. Moon said. “I sincerely ask the IOC and (IOC member) Chang who are here with us today for their strong consideration and cooperation.”