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The leaders said the three countries will complete negotiations on investment agreement and provide a favorable investment environment to facilitate the operation of enterprises in the region.
They also reiterated the importance of customs cooperation, and vowed to further cooperation in finance, science and technology, innovation, as well as policy cooperation and negotiations in such areas as energy efficiency and resources.
"An open, fair and liberalized multilateral trade system is not only conducive to China, Japan and South Korea, but also important for the world. We must oppose protectionism of any form to safeguard and consolidate the system," said the document.
On cooperation in environmental protection, the leaders said the three countries should jointly push for achievements at the climate change summit to be held in Mexico this year, including an effective international cooperation framework in this regard after 2012, under the principles of the United Nations Framework Convention on Climate Change, especially the principle of common but differentiated responsibilities.
On regional peace and stability, the three leaders said the denuclearization on the Korean Peninsula is very much conducive to lasting peace, security and economic prosperity in Northeast Asia.