Prime Minister Shinzo Abe might decline to attend the Pyeongchang Winter Olympics in February, given South Korea's new misgivings about the historic 2015 "comfort women" agreement, a Japanese government source said Thursday.

The remark signals growing disappointment with the administration of President Moon Jae-in, which invited Abe to attend the opening ceremony on Feb. 9.

On Wednesday, after a South Korean government task force found flaws in the domestic process that led to the December 2015 accord, Moon said it was unable to resolve their longtime dispute over the Korean women forced to work in Japan's wartime military brothels before and after the war.