Yasushi Akashi, former UN undersecretary-general makes a speech during the welcome reception before the 9th Beijing-Tokyo Forum in Beijing, Oct 25, 2013. [Photo by Zou Hong / chinadaily.com.cn]

Yasushi Akashi, former undersecretary of the United Nations, called for Japan and China to work together in establishing a crisis management system to reduce misunderstanding and bring intense bilateral relations to track.

Yasushi, now chairman of the board of the non-profit, non-political organization, International House of Japan, said he was disappointed about the current tensions as the two countries mark the 35th anniversary of signing the treaty of peace and friendship.

Exclusive nationalism is the mutual enemy that Japan and China should avoid, he said at the 9th Beijing-Tokyo Forum in Beijing.

"Very few people have not pondered deeply..., their words and actions are not prudent. This can not be tolerated," Yasushi said without giving details.

He also hoped scholars to the forum could have candid talks and make calm analysis in order to create a favorable environment to improve China-Japan ties.