South Korean president Moon Jae-in has begged Vladimir Putin to help "tame" North Korea before the situation spins entirely out of control.
The Russian President said imposing tougher sanctions on trade partner North Korea over its nuclear missile program would be counter-productive and spoke out against "military hysteria" after the United States called for the "strongest possible measures" to rein in the rogue state.
"We should not give in to emotions and push Pyongyang into a corner", Putin said during a news conference after meeting with Moon on Wednesday in Vladivostock.
"We estimate this was far bigger than previous nuclear tests", Defence Minister Itsunori Onodera told reporters.
"But I believe the current conditions require us to strongly condemn North Korea's risky provocations and pressure the North, and that right now is not the time for dialogue".
Japanese Prime Minister Shinzo Abe warned North Korea against continuing its current missile and nuclear weapons development policies.
A THAAD battery normally consists of six launchers, but only two have been operational so far.
The Chinese media didn't run any commentaries with critical perspectives even after North Korea conducted its sixth nuclear test, allegedly of a hydrogen bomb, which could dramatically change the security situation on the peninsula.
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South Korea and the United States are technically still at war with North Korea after the 1950-53 Korean conflict ended with a truce, not a peace treaty.
Chinese authorities lodged a formal complaint Wednesday with Seoul's ambassador to China, Kim Jang-soo, and on Thursday Beijing's Foreign Ministry issued a statement calling on Seoul and Washington to call off the THAAD deployment.
Geng also said that China urges the US and South Korea to "immediately stop the relevant deployment and remove the relevant equipment".
South Korean officials have also reported signs of another missile test in the works, possibly a long-range launch set for this weekend.
"We must make North Korea immediately and fully comply with all relevant UN Security Council resolutions and abandon all its nuclear and ballistic missile programmes in a complete, verifiable and irreversible manner", Abe insisted.
Experts say the distance and trajectory achieved in recent missile tests show that North Korea's claims to be able to hit the USA could be legitimate.
The U.N. Security Council, of which Russian Federation is a veto-wielding permanent member, is now debating imposing fresh sanctions on North Korea, with Japan and the United States pushing for an oil embargo on the reclusive state. "On the one hand it's asking North Korea to freeze or do what it's already supposed to be doing under global law", Pinkston said. "China has not just influence but has numerous levers that are needed to change behaviour in North Korea", Fallon told BBC radio.