Japan's government on Tuesday approved the introduction of the US military's land-based Aegis missile interceptor system, beefing up its defence against "serious" and "imminent" North Korea threats.

The regime in Pyongyang has fired two missiles over Japan this year and has threatened to "sink" the country into the sea.

Last month, North Korea test-fired an intercontinental ballistic missile (ICBM) that plunged into the waters of Japan's exclusive economic zone.

"North Korea's nuclear and missile development has entered a new stage of threat that is more serious and imminent to our country's security," the government said as it endorsed the introduction of Aegis Ashore at a cabinet meeting.

Japan needs to drastically improve its missile defence, Tokyo added.

Speaking later Tuesday at a lecture hosted by Jiji Press, Prime Minister Shinzo Abe vowed to take a hard look at whether Japan's defence capability is sufficient to protect its people.

"While keeping our defence-only policy as the basic premise, I will examine what our defence capability should truly be like while facing up to the severe reality for our country," he said.

Abe argued that the UN sanctions on Pyongyang must be taking effect now and dismissed the view that too much pressure could trigger an "explosion" of violence.

"Thinking that way gives North Korea the maximum bargaining power... What is important is not to give in to North Korea's bluff," he said, vowing to keep imposing pressure until Pyongyang begs for dialogue.

Abe also sought cooperation from China to solve the problem.

"As the North Korean issue faces an important phase, the role of China is extremely important," he said, adding he wanted to elevate relations with China to "a new level" by reciprocal visits and other exchanges.

- 'Permanent vigilance' -

Japan plans to introduce the Aegis Ashore system at two locations, covering the entire nation with powerful radars.

The deployment will hand the US ally another layer of defence in addition to SM-3 guided missiles launched by Aegis destroyer vessels and Patriot Advanced Capability-3 (PAC-3) missiles.

However, it will take years before the Aegis Ashore system is operational, according to Japanese officials.

The contract is yet to be signed with the United States and deployment at two locations could cost a total of 200 billion yen ($1.8 billion), including the cost of building new facilities.

However, officials insisted the new system would boost Japan's missile defence.

"Naval vessels need to return to their ports regularly for rest and refuelling, but if it's ground deployment, we will be able to operate almost 24-7," an official said.

"We can be on permanent vigilance even when signs (of missile firing) are hard to detect," he said.

Japan is reportedly planning a record $46 billion defence budget for the next fiscal year in the face of the North Korean threat.

Defence Minister Itsunori Onodera said this month the country also plans to purchase long-range cruise missiles from US firms with a range of some 900 kilometres (560 miles).

The move would be controversial as Japan's pacifist constitution bans the use of force as a means of settling international disputes.

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US, S. Korea, Japan start missile-tracking drill, irking China
Seoul (AFP) Dec 11, 2017
The US, South Korea and Japan carried out joint exercises Monday to track missiles from North Korea, as China warned that such manoeuvres fuel tensions following nuclear-armed Pyongyang's longest-range test launch to date. The trilateral drill comes less than two weeks after Pyongyang test-fired a new intercontinental ballistic missile (ICBM) and declared it had achieved nuclear statehood, e ... read more

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