Japan's PM Shinzo Abe visits Russia to warm ties with Vladimir Putin

Japanese Prime Minister Shinzo Abe is set to meet Russian President Vladimir Putin in Russia's far east on Friday as the countries step up efforts to boost trade ties and resolve a lingering territorial dispute.

Tokyo-Moscow relations are hamstrung by a row dating back to the end of World War II when Soviet troops seized the southernmost islands in the Pacific Kuril chain, known as the Northern Territories in Japan.

The tensions have prevented the countries from signing a peace treaty formally ending wartime hostilities, hindering trade and investment ties.

Abe's visit to Russia — his second this year — comes days after the Kremlin announced that Putin will travel to Japan in December, his first trip to the country since 2005.

Experts view recent rapprochement efforts as a positive development for Moscow's trade ties with stalwart US ally Tokyo but doubt that they will result in a resolution of their territorial dispute.

Over the years, leaders from the two nations have tried to make headway on resolving the row but a solution has proved elusive and still looks some way off.

Both sides have confirmed that Friday's talks — taking place on the sidelines of an economic forum in the far eastern Russian city of Vladivostok — will touch upon the disputed islands.

Japan's top government spokesman Yoshihide Suga told AFP that only "frank talks" could pave the way to a peace treaty.

But neither side has signalled it is ready to compromise.

"The two parties are likely to show that they are in favour of a peace treaty but will try not to publicly express their disagreements about the Kuril islands," Russian political analyst Konstantin Kalachev said.

"Japan is not ready to drop its claims to the islands and Russia will by no means recognise them."

Foreign minister Lavrov said earlier this year that Russia wants to "move forward" its ties with Japan but is not prepared to budge on the "result of World War II".

Russia has angered Japan recently by building new modern compounds for its troops stationed on two of the disputed islands.

Prime Minister Dmitry Medvedev infuriated Tokyo last year when he visited the islands, which are home to some 19,000 Russians.

Kremlin aide Yury Ushakov told reporters that boosting trade will be "at the heart" of Putin's talks with Abe — after Japan joined the US and EU to slap sanctions on Russia over its meddling in Ukraine.