In a rare statement on Sept. 22, North Korean leader Kim Jong Un called President Trump a "mentally deranged U.S. dotard," vowing to "tame him" with fire. On Sept. 19, Trump threatened to "totally destroy" North Korea in front of the United Nations General Assembly. (Reuters)

TOKYO — North Korean leader Kim Jong Un has warned President Trump that he will make the U.S. leader “pay dearly” for his threat to totally destroy North Korea, in an unusual direct and angry statement published Friday.

Calling Trump a “mentally deranged U.S. dotard” and his speech to the U.N. General Assembly “unprecedented rude nonsense,” Kim said that he was now thinking hard about how to respond.

“I will make the man holding the prerogative of the supreme command in the U.S. pay dearly for his speech,” Kim said in a statement released by the official Korean Central News Agency, which also published a photo of the North Korean leader sitting at his desk holding a piece of paper.

“I am now thinking hard about what response he could have expected when he allowed such eccentric words to trip off his tongue. Whatever Trump might have expected, he will face results beyond his expectation,” Kim said, saying that he would “tame” Trump “with fire.”

South Korea’s Yonhap news agency reported Thursday night that the North’s foreign minister, Ri Yong Ho, said in New York that his country may test a hydrogen bomb in the Pacific Ocean to fulfill Kim’s vow to take the “highest-level” action against the United States.

“It could be the most powerful detonation of an H-bomb in the Pacific,” Ri said. “We have no idea about what actions could be taken as it will be ordered by leader Kim Jong Un.”

U.S. officials believe the North carried out its first hydrogen bomb test on Sept. 3.

In his maiden address to the U.N. General Assembly on Tuesday, Trump called Kim “Rocket Man” and said that his administration was prepared to defend the country and its allies if Kim continued to threaten the United States and to destabilize East Asia.

“The United States has great strength and patience, but if it is forced to defend itself or its allies, we will have no choice but to totally destroy North Korea,” Trump said. “Rocket Man is on a suicide mission for himself.”

Here is the full statement published by KCNA on Friday morning:

Statement of Chairman of State Affairs Commission of DPRK

Pyongyang, September 22 (KCNA) — Respected Supreme Leader Kim Jong Un, chairman of the State Affairs Commission of the DPRK, released a statement on Thursday.

The full text of the statement reads:

The speech made by the U.S. president in his maiden address on the UN arena in the prevailing serious circumstances, in which the situation on the Korean peninsula has been rendered tense as never before and is inching closer to a touch-and-go state, is arousing worldwide concern.

Shaping the general idea of what he would say, I expected he would make stereo-typed, prepared remarks a little different from what he used to utter in his office on the spur of the moment as he had to speak on the world's biggest official diplomatic stage.

But, far from making remarks of any persuasive power that can be viewed to be helpful to defusing tension, he made unprecedented rude nonsense one has never heard from any of his predecessors.

A frightened dog barks louder.

I'd like to advise Trump to exercise prudence in selecting words and to be considerate of whom he speaks to when making a speech in front of the world.

The mentally deranged behavior of the U.S. president openly expressing on the UN arena the unethical will to “totally destroy” a sovereign state, beyond the boundary of threats of regime change or overturn of social system, makes even those with normal thinking faculty think about discretion and composure.

His remarks remind me of such words as “political layman” and “political heretic” which were in vogue in reference to Trump during his presidential election campaign.

After taking office Trump has rendered the world restless through threats and blackmail against all countries in the world. He is unfit to hold the prerogative of supreme command of a country, and he is surely a rogue and a gangster fond of playing with fire, rather than a politician.

His remarks which described the U.S. option through straightforward expression of his will have convinced me, rather than frightening or stopping me, that the path I chose is correct and that it is the one I have to follow to the last.

Now that Trump has denied the existence of and insulted me and my country in front of the eyes of the world and made the most ferocious declaration of a war in history that he would destroy the DPRK, we will consider with seriousness exercising of a corresponding, highest level of hard-line countermeasure in history.

Action is the best option in treating the dotard who, hard of hearing, is uttering only what he wants to say.

As a man representing the DPRK and on behalf of the dignity and honor of my state and people and on my own, I will make the man holding the prerogative of the supreme command in the U.S. pay dearly for his speech calling for totally destroying the DPRK.

This is not a rhetorical expression loved by Trump.

I am now thinking hard about what response he could have expected when he allowed such eccentric words to trip off his tongue.

Whatever Trump might have expected, he will face results beyond his expectation.

I will surely and definitely tame the mentally deranged U.S. dotard with fire.