Chinese Premier Li Keqiang has finished his three-day visit to Japan and is due back in China later today.
China has agreed to grant Japan RMB Qualified Foreign Institutional Investors (RQFII) quota of 200 billion yuan (about $31.36 billion), Chinese Premier Li Keqiang said on Wednesday.
Li believes, the treaty will strengthen bilateral ties and is a vital move in the direction of peace and friendship between China and Japan.
"As close neighbours and major economies of the world, long-term, healthy and stable relations between China and Japan are mutually beneficial and in line with the peace, stability and prosperity of the region and the world", Li was quoted as saying by state-run Xinhua.
Japanese Prime Minister Shinzo Abe, and more than 1,400 representatives from both countries participated in the event, which Li said showcased a wide range of common interests shared by the two countries. He has met with Abe on Wednesday as they agreed to enhance political mutual trust and step up economic cooperation between the two countries.
Forty years ago, the older generation of leaders from China and Japan showed great farsight and strategic resolve by concluding the treaty, said Li.
"But cooperating under the belt and road plan will be good for Japan too, because it's an opportunity for Japan to reach broader markets through this New Silk Road". China again invites and welcomes Japan to actively take part in the first China International Import Expo (CIIE).
Abe said bilateral relations are standing at a new starting point.
Diplomatic relations between the two nations have improved in recent years after deteriorating sharply in 2012, when Tokyo nationalized a cluster of disputed East China Sea islets that China also claims.
Abe called on the two sides to turn competition into coordination. "It does not include the Senkakus", a Japanese government official said.
"Cooperation will be good for both China and Japan, as long as it's honest".