However, he said that he and most people believe that wiser minds in the USA would not allow any pre-emptive war on the North. A senior administration official said the USA was still assessing last weekend's underground explosion but so far noted nothing inconsistent with Pyongyang's claim.
A THAAD battery normally consists of six launchers, but only two have been operational so far.
The Japanese leader's comments come as Japan has again upgraded its estimated size of North Korea's latest nuclear test to a yield of around 160 kilotons - more than ten times the size of the Hiroshima bomb.
Ms Haley said at an emergency meeting of the UN Security Council that the United States would look at countries doing business with the regime and circulate a resolution this week and try and get it approved before 11 September.
They recalled the global community's criticism on North Korean provocations and agreed that the situation demanded new pressures from the worldwide community to force North Korea to negotiate and avoid risky escalation.
Sweden has had diplomatic relations with North Korea since 1973. No mention was made of other retaliatory measures, such as the possible use of force.
There was bipartisan consensus that Trump's national security team outlined a sensible strategy for dealing with a problem that has no good solution and has now stymied the United States for decades, but Democrats said their assessment - in both tone and strategy - was at odds with the commander in chief.
North Korea, which is pursuing its nuclear and missile programmes in defiance of worldwide condemnation, said it would respond to any new UN sanctions and U.S. pressure with "powerful counter measures", accusing the United States of aiming for war.
The White House on Wednesday released details of calls Tuesday with British Prime Minister Theresa May and Australian Prime Minister Malcolm Turnbull.
"It is time to step up sanctions and secure sufficient military means to deter them in order to stop North Korea's nuclear armament", Lee said. He and May agreed to continue work on "increasing diplomatic and economic pressure on North Korea".
Meanwhile, China's permanent representative to the UN Liu Jieyi on Monday condemned the latest nuclear test by North Korea and urged the country to return to the track of dialogue.
Trump is to speak Wednesday with China's president.
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"Our commitment among the allies are ironclad", Mattis said. It also has the Patriot missile defense system in Japan.
Ministry spokesman Geng Shuang clarified later today that China would support the consensus of the UN Security Council.
He says he would prefer not to go the military route, but he says it could happen - and if it did, it would be "a very sad day for North Korea".
South Korea said it was talking to Washington about deploying aircraft carriers and strategic bombers to the Korean peninsula.
The South's defense ministry confirmed on Wednesday the launchers would be installed on a former golf course near Seongju City some 135 miles south of Seoul.
But Chinese President Xi Jinping has been silent since North Korea tested what was believed to be its first ever hydrogen bomb on Sunday. He said it "offers a genuine way to defuse the tensions and a step-by-step settlement".
President Donald Trump stepped back from the possibility of imminent military action against North Korea on Thursday, saying such an event is neither inevitable nor preferable.
Meanwhile, the four remaining launchers of a USA missile defense system were deployed in the South Korea.
"There is no other way to solve the North Korean nuclear issue, save that of peaceful dialogue".
Pyongyang's nuclear program is in "violation of multiple UN Security Council resolutions and a major threat to the non-proliferation regime", North Atlantic Treaty Organisation said in a statement.
The North is just coming off its sixth and the most powerful nuclear test to date on Sunday in what it claimed was a detonation of a thermonuclear weapon built for its ICBMs.
Mr Abe and Mr Putin are also expected to discuss economic cooperation and a peace treaty between the two nations.