The North's official Korean Central News Agency carried Kim's comments today a day after US and South Korean militaries detected the missile launch from the North Korean capital of Pyongyang.
It travelled 3,700 kilometres as it flew over Japan before landing in the northern Pacific Ocean. It was the country's longest-ever test flight of a ballistic missile.
The North has confirmed the missile as an intermediate range Hwasong-12, the same model launched over Japan on August 29.
While the English version of the report was less straightforward, the Korean version quoted Kim as declaring the missile as operationally ready. He vowed to complete his nuclear weapons program in the face of strengthening international sanctions, the agency said.
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The UN Security Council accused North Korea of undermining regional peace and security by launching its latest missile over Japan and said its nuclear and missile tests "have caused grave security concerns around the world" and threaten all 193 UN member states.
"As recognised by the whole world, we have made all these achievements despite the UN sanctions that have lasted for decades," the agency quoted Kim as saying.
Kim said the country's final goal "is to establish the equilibrium of real force with the US and make the US rulers dare not talk about military option for the DPRK," referring to North Korea's official name, the Democratic People's Republic of Korea.
Prior to the launches over Japan, North Korean had threatened to fire a salvo of Hwasong-12s toward Guam, the US Pacific island territory and military hub the North has called an "advanced base of invasion."
The Security Council stressed in a statement after a closed-door emergency meeting that all countries must "fully, comprehensively and immediately" implement all UN sanctions.
Bessho and the British, French and Swedish ambassadors demanded that all sanctions be implemented.
Calling the latest launch a "terrible, egregious, illegal, provocative reckless act," Britain's UN Ambassador Matthew Rycroft said North Korea's largest trading partners and closest links a clear reference to China must "demonstrate that they are doing everything in their power to implement the sanctions of the Security Council and to encourage the North Korean regime to change course."
Friday's launch followed North Korea's sixth and most powerful nuclear test on September 3 in what it described as a detonation of a thermonuclear weapon built for its developmental intercontinental ballistic missiles.
The North flight tested its Hwasong-14 ICBMs twice in July and analysts say the missiles could potentially reach deep into the US mainland when perfected.
The growing frequency, power and confidence displayed by Pyongyang's nuclear and missile tests seem to confirm what governments and outside experts have long feared: North Korea is closer than ever to its goal of building a military arsenal that can viably target US troops both in Asia and in the US homeland.
South Korean President Moon Jae-in, a liberal who initially pushed for talks with North Korea, said its tests currently make dialogue "impossible."
"If North Korea provokes us or our allies, we have the strength to smash the attempt at an early stage and inflict a level of damage it would be impossible to recover from," he said.
Robust international diplomacy on the issue has been stalled for years, and there's so far little sign that senior officials from North Korea and the US might sit down to discuss ways to slow the North's determined march toward inclusion among the world's nuclear weapons powers.
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