But Russia's UN Ambassador Vassily Nebenzia said on Tuesday that a U.S. bid for the Security Council to vote on September 11 on new sanctions is "a little premature".
South Korea President Moon Jae-in met with Japanese Prime Minister Shinzo Abe Thursday morning in Vladivostok where they're attending the Eastern Economic Forum, hosted by Russian President Vladimir Putin.
North Korea's hydrogen bomb test on September 3 is a "grave violation" of United Nations resolutions and threatens regional security, the Russian president said on Wednesday. The two countries have been at loggerheads over South Korea's decision to deploy a USA anti-missile system, the Terminal High Altitude Area Defense, which has a powerful radar that can probe deep into China.
Dozens of people were injured in clashes between South Korean protesters and police Thursday as the US military added more launchers to the high-tech missile-defense system it installed in a southern town to better cope with North Korean threats.
However, it appears the differing views held by Abe and Putin remained that way during their summit talks.
Mr Putin said he believes US President Donald Trump's administration is willing to defuse tensions over North Korea's nuclear ambitions.
South Korean President Moon Jae-in, following his meeting with President Putin in Vladivostok yesterday, said although previous projects between Russian Federation and South Korea had not been developed, "we chose to develop the projects that may be implemented in the near future, primarily the projects in the Far East".
Mr Moon had called for Moscow to support stronger sanctions against Pyongyang, which conducted its sixth nuclear test on Sunday in what it claimed was a detonation of a thermonuclear weapon built for intercontinental ballistic missiles capable of reaching the U.S. mainland.
He also confirmed his country had successfully conducted its sixth and largest nuclear bomb test on Sunday.
Protesters stage a rally against the deployment of an advanced US missile defense system called Terminal High-Altitude Area Defense, or THAAD, near the presidential Blue House in Seoul, South Korea, Friday.
Putin echoed a phrase told by former Pakistan Prime Minister Zulfikar Ali Bhutto, the father of Benazir Bhutto, who in 1965 said that Pakistanis "will eat grass, even go hungry" to acquire nuclear weapons.
"Russia understands that because it is just as paranoid about American "democracy promotion" as North Korea is", he adds.
Moon, who took office this year advocating a policy of pursuing engagement with North Korea, has come under increasing pressure to take a harder line.
"I would prefer not going to the route of the military but it is certainly something that could happen", Trump said. The key to this process is held by Russian Federation and China, which are permanent members of the Security Council and have the right of veto.
Abe will meet Putin on Thursday.
Opposition to THAAD has been fierce both within South Korea and without.
Allowing the U.S. military to deploy nuclear weapons on Japanese territory would pose a grave political risk for Prime Minister Shinzo Abe, particularly amid an influence-peddling scandal that has hit his popularity ratings.
"While Moon is not having his way with North Korea, that won't immediately bring his approval rate down", Prof Lee said.