Mr Suh is set to meet Japanese Prime Minister Shinzo Abe and Chief Cabinet Secretary Yoshihide Suga today, the spokesman added.
"The offer was made and we've accepted", she said.
He noted that it is "very significant" that Kim expressed his willingness to denuclearize.
For the time being, USA plans to launch a military strike on North Korea are on the back burner and there is hope for an easing of tensions on the Korean Peninsula. At around the same time that he is intending to meet with North Korea's dictator, Kim Jong Un, for the first time, he is threatening to pull out of the Iran accord without European support for a renegotiation of its terms. The Trump-Kim summit is supposed to take place by May.
The Blue House said Abe asked Suh detailed questions about the North's current position. "I would say remain patient, and we'll see what happens", he said. Tokyo, however, suspects that there are more victims. The group recently held talks with North Korea, which has since been calling for unification.
After George Bush named it part of the "axis of evil" with Iraq and Iran, North Korean leaders had every reason to believe that nuclear weapons - and their ability to destroy South Korea's capital with conventional weapons - were essential to deter any attack on them. "I renew my call for the president to appoint an American ambassador to South Korea and a new top diplomat for North Korea issues as soon as possible". Kim is likely to raise the possibility of such a treaty along with establishing diplomatic relations and moving toward nuclear disarmament, during a meeting with the US leader, the Dong-A Ilbo newspaper said Monday, citing an unidentified senior official in South Korea's presidential office.
Chung said Moon is hoping for a "continued active role by China" in engaging North Korea and invited Xi to Seoul. North Korea reneged on its 1994 pledge to the U.S.to freeze nuclear development and instead raced ahead.
The Chinese leader said he wants the global community, including South Korea, to find a political resolution to the Korean Peninsula issues by adding proposals by each country to China's proposal of a "parallel track" approach.
At the annual press conference held during China's National People's Congress, Chinese Foreign Minister Wang Yi took credit for the Korean Peninsula breakthrough.
According to Kim, Xi appreciated Moon's decision to send Chung for the briefing.
China was the host and convener of the Six-Party Talks, a 2003-2007 process that saw North Korean representatives sit down with delegates from the United States and four other countries to discuss ending the North's nuclear program in exchange for incentives. He is scheduled to return to Korea on Wednesday.
On Monday, Japanese Foreign Minister Taro Kono and Suh, who visited Washington after Pyongyang, agreed to work in close coordination on the issue of North Korea's abductions of Japanese citizens decades ago.