South Korea’s President Park Geun-hye has defended a deal reached with Japan last month over the controversial issue of war-time women sex slaves, warning politicians and media against undermining the agreement.   

"You can't always be 100 percent satisfied in negotiations because there are various practical constraints," Park said on Wednesday.

"It was a very difficult problem that previous governments had not been able to properly deal with," she said, adding that it is very difficult to “convince the public if there are any more remarks that scar the victims."

Last month, Seoul and Tokyo inked a landmark agreement over the issue that had for decades been a major cause for animosity between the two countries.

Under the deal, Japan will give a one billion yen (USD 8.3 million) compensation fund for 46 surviving Korean "comfort women."

After reaching the deal, Japanese Prime Minister Shinzo Abe heralded a "new era" in Japanese - South Korean relations and expressed “anew his most sincere apologies and remorse to all the women who underwent immeasurable and painful experiences and suffered incurable physical and psychological wounds as comfort women.”

“Comfort women” is a term being used for Korean and other Asian women who were forced into sexual slavery by the Japanese imperial army in occupied territories before and during World War II.

It is estimated that up to 200,000 women, mostly Koreans, were forcefully sent to frontlines to offer sex to Japanese soldiers during the Second World War. Other women came from China, the Philippines, Indonesia and Taiwan.