Russia's secret plans targeted Japan and South Korea
Beijing has yet to announce the closing ceremony for its "Year of Friendship" with Pyongyang, a possible signal of disapproval.
South Korea's military has said that North Korea is preparing to continue aiding Russia in its war with Ukraine, despite casualties.
Ukrainian special forces have released several excerpts from a purported diary it said was found on a North Korean soldier killed in front-line fighting in Russia.
Russia and Japan have never signed an official peace treaty to end the second world war because of a dispute over the Kuril Islands. The Soviet army seized the Kurils at the end of the war in 1945 and expelled Japanese residents from the islands, which are now home to about 20,000 Russians.
North Korean leader Kim Jong Un pledged to solidify the country's comprehensive strategic partnership with Russia in his letter to President Vladimir Putin on Monday, state media KCNA reported on Tuesday.
North Korea's Kim Jong Un vowed to implement the "toughest" anti-U.S. policy, less than a month before Donald Trump takes office as U.S. president.
"Through various sources of information and intelligence, we assess that North Korean troops who have recently engaged in combat with Ukrainian forces have suffered around 1,100 casualties," the JCS said in a statement.
North Korean leader Kim Jong Un says he will implement the “toughest” anti-U.S. policy, less than a month before Donald Trump takes office as U.S. president
North Korean President Kim Jong Un on Monday declared a "new high" in relations between North Korea and Russia and hoped for a Russian victory over Ukraine in 2025.
Although the precise details of the arrangement have not been made public, there has been considerable media coverage of North Korea’s dispatch of combat troops to Russia to support Vladimir Putin’s offensive in Ukraine.