Japan has rejected Russian President Vladimir Putin's claim that it is responsible for stalling bilateral talks on a decades-long territorial dispute, and called for speeding up negotiations.

"There's absolutely no fact that supports the claim the Japanese side has stopped the negotiations for concluding a (bilateral) postwar peace treaty," Foreign Minister Fumio Kishida told reporters Friday.

In Moscow on Thursday, Putin told reporters he is ready to resume talks with Japan over the isles under a 1956 Japan-Soviet Union joint declaration and blamed Japan for stalling such talks.