The main obstacle to signing a peace treaty is Tokyo's long-standing claims to the southern part of the Russian Kuril Islands, collectively known in Japan as the "Northern Territories".
It is reported by the Chronicle.info with reference to Capital.
In a sudden about turn, Russia's President suggested that a historic peace deal "without any preconditions" could be signed by the end of the year.
"It seems to me counterproductive if we demand everything from the North Korean side and in response they are given nothing", he said at an event with China's Xi Jinping and Japan's Shinzo Abe. However, since any significant progress in this direction was not done.
Last year, Tokyo launched a complaint over plans to lay an undersea telecom cable, linking the three disputed islands with Russia's Sakhalin Island.
This is the first time a Chinese head of state has attended the EEF, and the most important bilateral exchange between China and Russian Federation during the second half of the year, according to Assistant Foreign Minister Zhang Hanhui.
Speaking at the economic conference in Vladivostok earlier on Wednesday Abe said he and Putin share an opinion "that this is not normal" that the two countries still have not signed a peace treaty.
"South Korea's prime minister Lee Nak-yon is in Russia for the Fourth Eastern Economic Forum in Vladivostok. and there he sat down with Russian President Vladimir Putin to discuss ways to boost economic cooperation between Seoul and Moscow".
Seventy-three years after the war concluded, the two countries remain technically at war because of a territorial dispute over four Pacific islands.
Abe said he and Putin approved a "road map" to realize the activities on the islets in five areas - aquaculture, greenhouse farming, tourism, wind power and waste reduction - which they agreed on a year ago.
A Japanese Foreign Ministry official remained somewhat perplexed by Putin's remark. Putin said bilateral ties between the countries are "greatly improving" (The Japan Times).
Abe smiled at the suggestion.
Lying near the Japanese island of Hokkaido, the territory was taken over by Red Army troops in the final days of World War II.