The deployment of THAAD was agreed upon between the USA and South Korea a year ago, but has been delayed due to environmental impact assessments and diplomatic issues.
South Korea is moving swiftly to install four new Terminal High Altitude Area Defense (THAAD) rocket launchers on its territory.
Guam, a major USA military hub in the Pacific, is home to roughly 160,000 American citizens, and was recently added to the list of places North Korea is threatening to bomb.
"To be more precise, I think it is altogether impossible", he added.
South Koreans have taken to the streets in recent months to protest the missile defense system, anxious by the escalation of the current crisis on the Korean peninsula. Further protests have been called for Thursday by activists opposed to the presence of THAAD. In today's edition of Rodong Sinmun, a column titled "Reckless Sabre-rattling Precipitating Self-Destruction" threatens to "put a definite end to the US imperialists and south Korean puppet forces' moves to ignite a nuclear war on the Korean peninsula". Rather, it will undermine the regional strategic balance, harm regional security interests, including China's, and increase tensions on the Korean Peninsula, Geng said.
The announcement came three days after North Korea claimed to have successfully tested a hydrogen bomb, jolting not only South Korea and the USA but also its ally China.
They have raised worries over rumored health hazards linked to the system's powerful radar and the possibility that the town will become a target of North Korean attacks.
North Korea on Sunday triggered global alarm with by far its most powerful atomic test to date, claiming it was a hydrogen bomb that could be mounted onto a long-range missile.
The US is also expected to present a North Korean sanctions resolution at the United Nations, and is aiming for a vote to take place next week, AFP reported on Monday.
South Korean President Moon Jae-in has said ahead of a meeting with Russian President Vladimir Putin that he hopes their two countries can work together to resolve the North Korean nuclear issue.
Abe will meet Putin on Thursday.