Japanese Prime Minister Shinzo Abe, Chinese Premier Li Keqiang, and South Korean President Park Geun Hye will meet in Seoul on Sunday for the first summit between the three countries in since 2012.

While past historical issues will most likely be brought up, the leaders hope to move forward in order to boost stability in Northeast Asia and better relations with Tokyo, according to South Korean and Chinese officials. The Washington Post also reports that all three countries are concerned over North Korea and its nuclear capabilities and may discuss the matter at the meeting. However, Sunday’s meeting is said to be a first step toward burying the past.

“None of them wants to be seen stonewalling the cooperation,” said Shin Kawashima, a University of Tokyo professor of international studies. They all have soft spots “so they want to find a comfortable middle ground,” he told Fox News.

And it is a tricky situation for the three Asian powers as Tokyo does not want to discuss history, Beijing, for political reasons, can’t be too friendly with Japan, and Seoul doesn’t want the U.S. to think they are getting too close to China.

Reuters reports that the bad blood between the nations are due to past wartimes when China and South Korea suffered under Japan’s colonial rule and brutal occupation before Japan was defeated in 1945.