Chief Cabinet Secretary Yoshihide Suga said Wednesday that Japan remains unchanged in its stance to sign a peace treaty with Russian Federation after resolving the issue of the four northern islands.
He made the remarks while meeting Japanese Prime Minister Shinzo Abe at the Eastern Economic Forum in Russian Federation.
Analysts say that presence of the two leaders who have arrived from Tokyo and Seoul demonstrates the interest of key countries of the Asia-Pacific in realising Mr. Putin's ambitious regional plan, which has China and other countries, including India, as possible partners.
Russian Federation and Japan have been in dispute for seven decades over the islands and as a result have still not formally ended their World War Two hostilities.
Xi's Vladivostok trip is pragmatic and efficient, and conducive to promoting benign interactions between major countries, he said, adding that it was also an important move in the building of a community with a shared future for mankind.
It has kept the two countries from signing a peace accord.
After Abe pressed Putin on the subject of a treaty and a solution to the decades-long dispute over a group of islands claimed by both countries, Putin said: "An idea has just come into my head".
A former Russian deputy foreign minister, Georgy Kunadze, said he doubted that Putin wanted to solve the territorial problem in earnest.
Relations between China and Japan soured in 2012 over a territorial dispute over several tiny islands in the East China Sea.
Russian President Vladimir Putin and his Chinese counterpart Xi Jingping displayed their cooking skills on the sidelines of an worldwide economic forum.
"This stance hasn't changed", he added.
In Moscow, Deputy Foreign Minister Igor Morgulov told Russian news agencies that Putin's announcement would not require any changes to the current format of negotiations.
As Donald Trump continues to up the ante on a trade war, with the U.S. president recently threatening to place tariffs on all Chinese exports to the United States, Beijing is moving to further solidify its already-close partnership with Russian Federation.
Lying near the Japanese island of Hokkaido, the territory was taken over by Red Army troops in the final days of World War II.