The USS Ronald Reagan met with a Japanese Self-Defence Force helicopter carrier and two destroyers in preparation for World War 3.
The aircraft carrier strike group included 14 US destroyers and cruisers, some armed with ballistic missile interceptors.
The drills began on September 11, the same day the UN council approved new sanctions against the rogue state.
North Korea has been conducting a series of nuclear tests since July this year.
The hermit kingdom fired a ballistic missile over Japan earlier this month and after detonating a hydrogen bomb that was so powerful it caused an earthquake.
Trump used his maiden speech in the UN this week to hurl threats against North Korea, calling Kim Jong-un “Rocket Man” and saying that North Korea faces total destruction if he attacks the US or its allies.
Kim later hit back and said: “I will surely and definitely tame the mentally deranged US dotard with fire.”
North Korean Foreign Minister Ri Yong-ho said that Kim is now contemplating a hydrogen bomb test somewhere in the Pacific Ocean.
US Secretary of State Susan Thorton was asked by reporters why the US has not intercepted any ballistic missiles fired by North Korea.
She responded: “Early Friday morning in the US, Trump tweeted, “Kim Jong-un of North Korea, who is obviously a madman who doesn’t mind starving or killing his people, will be tested like never before!”
The US military has a huge presence in the area around North Korea, particularly in Japan and increasingly close allies South Korea.
There are almost 40,000 US troops serving in Japan, more than in any other country, and earlier this year the US Air Force lined up a huge array of helicopters, tactical fighter jets and surveillance aircraft in a show of force aimed to intimidate Kim Jong-un.
South of the demilitarised zone (DMZ), the US has 23,468 troops at 83 different sites as well as hundreds of tanks and armoured vehicles, meaning there is always a heavy military presence should North Korea decide to launch a land attack.