Meanwhile, according to the report of Chinese state radio, Li had also spoken to Moon about the US Terminal High Altitude Area Defense System now installed in Seoul and said that he hopes the issue will be handled appropriately.
The most recent previous official visit to Japan by a Chinese premier was the trip made by his predecessor Wen Jiabao in 2011.
The meeting came after a three-way summit between Abe, Li and South Korean President Moon Jae-in earlier in the day, the first such three-way gathering in two and a half years.
Li believes, the treaty will strengthen bilateral ties and is a vital move in the direction of peace and friendship between China and Japan.
Sun Cheng, a Japanese affairs expert at the China University of Political Science and Law, said while Li's visit was a good sign for bilateral ties, suspicions ran deep between the two sides.
He said he is convinced that cooperation among the three neighbors will lead to peace and prosperity on the peninsula and Northeast Asia.More news: NVDA) — NVIDIA Corporation (NASDAQ
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A new chance has emerged for the improvement and development of bilateral relations, Li said, urging the two neighbors to take new steps for their ties to progress and to bolster the confidence of the two peoples and of the entire global community in the development of China-Japan relationship.
As two of the world's major economies, China and Japan should make further efforts to safeguard the multilateral trading system and free trade by fighting against rising protectionism, Li said.
The premier called on Japan to align its development strategies with the Belt and Road Initiative, boost cooperation in innovation and high-end manufacturing.
Li told the emperor that the latter's interaction with the people in China has left an "impression" and is "symbolic" of the friendship between their countries.
Japanese Prime Minister Shinzo Abe also welcomed a string of business commitments from China, including a RMB 200 billion ($31.4 billion) investment quota for Japan investors to buy Chinese stocks.