The leaders of Russia and Japan fell short of agreement Tuesday over a disputed island chain that has long prevented a peace treaty to formally end World War II.
Japanese Prime Minister Shinzo Abe's visit to Moscow marked the 25th time he and Russian President Vladimir Putin have met since 2013, a reflection of their efforts to build cooperation despite the territorial disagreement.
The Soviet army seized the four Kuril islands, between the Sea of Okhotsk and the Pacific Ocean, in the last days of World War II.
Tokyo's refusal to recognise Moscow's sovereignty there has been a barrier to peace for more than seven decades.
Putin told journalists following the talks there that "detailed work" remained ahead of the two parties before any agreement, but hailed the summit as "useful and substantial."
His spokesman Dmitry Peskov indicated after the summit that Moscow would be keen to see some investment to get the peace talks rolling. "Trade and economic ties must be developed, and that will allow other issues to be resolved."
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