The results of the WW II must not be rivised. Do not forget that they were the Kurily islands,from which the troops of the agressor started their operation for distruction Purl Harbour. To rivise means to change the most borders in the world. The UN has the special resolution on the item.
Those islands are the strategical border of Russia, form the sea there the our internal sea. Russia never rejected the projects of cooperation with Japan concerning the development of the territory.
It is not the problem of the russians that another country has too small territory.
If japonese people lived there many years ago, why not to remember about germans of Sylesia,
about Elsass and Lotaringia..it may lead us even to the greeks in Konstantinopol...