SEOUL, South Korea — North Korea’s leader, Kim Jong-un, said on Sunday that his country was making final preparations to conduct its first test of an intercontinental ballistic missile — a bold statement less than a month before the inauguration of President-elect Donald J. Trump.

Although North Korea has conducted five nuclear tests in the last decade and more than 20 ballistic missile tests in 2016 alone, and although it habitually threatens to attack the United States with nuclear weapons, the country has never flight-tested an intercontinental ballistic missile, or ICBM.

In his annual New Year’s Day speech, which was broadcast on the North’s state-run KCTV on Sunday, Mr. Kim spoke proudly of the strides he said his country had made in its nuclear weapons and ballistic missile programs. He said North Korea would continue to bolster its weapons programs as long as the United States remained hostile and continued its joint military exercises with South Korea.

“We have reached the final stage in preparations to test-launch an intercontinental ballistic rocket,” he said.