Dmitry Peskov made the remarks on Sunday during a state-run TV program. The remarks come after Tuesday’s summit in Moscow between Japanese Prime Minister Shinzo Abe and Russian President Vladimir Putin.
Peskov said that a major goal in the talks is not to give something or get something, but to sign a peace treaty and end World War Two.
He suggested that the territorial issue over the four Russian-held islands should be separate from the peace deal.
Last September, Putin made a proposal to Abe that the two countries sign a peace treaty by the end of the year without any preconditions.
Japan rejected it, insisting that a peace treaty should only be signed after resolving the issue of the attribution of the four Russian-held islands. Russia controls the islands. Japan claims them.