The device, which North Korea described as a hydrogen bomb capable of being placed on a ballistic missile, was the most powerful tested to date.
"The two prime ministers strongly urged North Korea to abandon its nuclear and ballistic missile programmes and not to take any further provocative actions, and to fully comply with its global obligations under relevant UNSC resolutions including the newly and unanimously adopted resolution 2375, and other worldwide commitments", said the joint statement.
On the same day, South Korea announced it had conducted its first live-fire drill for an advanced air-launched cruise missile that would strengthen its pre-emptive strike capability against North Korea in the event of crisis. He has now visited North Korea 32 times as part of his "sports exchanges" between Japan and North Korea, which have no formal diplomatic ties.More news: Bahamas' beaches left bone dry after Hurricane Irma sucks up the water
However few expect these measures to be vigorously enforced as the Kim Jong Un government has become adept over the years in evading sanctions, and North Korea's trading partners, especially China and Russian Federation, have been complicit in permitting illicit transactions to continue despite official support for sanctions.
South Korea says it has found a small amount of radioactive element from air samples it collected following North Korea's latest nuclear test. "Those sanctions are nothing compared to what ultimately will have to happen", the president remarked alongside Malaysian Prime Minister Najib Abdul Razak.
Following the Kim Jong-un regime's latest round of nuclear brinkmanship, calls are growing for a return to South Korea of American tactical nuclear weapons. "It is something that markedly heightens regional tension and is absolutely unacceptable".
Nuclear-armed North Korea fired a ballistic missile over Japan on August 29 in a major escalation of tensions by Pyongyang. But now it likely can. Trump said on Twitter in response to the North's nuclear test.More news: Wilshere, Walcott among the players with Europa League points to prove
That helps explain why the Trump administration feels the North Korean threat is so urgent. Despite being much smaller, the country appears to be trying to antagonize its enemies, especially South Korea, China, the United States and Japan.
Images captured September 8 show a large cargo truck in the South entrance area of the testing site, which the analysts from 38 North suggest indicates that North Korea is prepping for another test. But South Korea must also deal with other threats from its Northern neighbor.
The Chinese say they are implementing sanctions along the border, but they have not been forthcoming in issuing clear restrictions to trading companies, or in reporting how required inspections of all goods crossing the North Korean border are being implemented.
So while some used to laugh at North Korea's boisterous statements, it's doubtful many in Washington, Seoul, and Tokyo are chuckling now.More news: Nintendo prepares itself for a Switch shortage around Christmas