The launch, the second in less than a week, was also tracked down by South Korea’s military.
North Korea fired on Tuesday morning what may have been a ballistic missile, Japan said, less than a week after Pyongyang tested what it said was a hypersonic missile.
South Korea announced that it had also tracked down the launch on Tuesday.
The joint chiefs of staff said the “unidentified projectile” had been fired into the sea east of the Korean Peninsula.
The latest test comes after six countries, including the United States and Japan, urged North Korea to put an end to “destabilizing actions” ahead of a closed session of the United Nations Security Council to discuss last week’s test.
France, Ireland, the United Kingdom and Albania also signed the declaration.
“These actions increase the risk of miscalculation and escalation and pose a significant threat to regional stability,” Linda Thomas-Greenfield, the US ambassador to the United Nations, said in a statement on Monday.
“(North Korea) is making these military investments at the expense of the well-being of the North Korean people,” she said.
Disarmament talks have stalled since a spate of summits between North Korean leader Kim Jong Un and then-US President Donald Trump collapsed in 2019.
Thomas-Greenfield has repeatedly called on North Korea to return to talks and abandon its missiles and nuclear weapons.
“Our goal remains the complete, verifiable and irreversible disarmament of the Korean Peninsula,” she said.
Pyongyang is banned by the United Nations from testing all types of ballistic and nuclear weapons tests and is subject to UN sanctions.
North Korea’s state media said last Thursday that it had a hypersonic missile, adding that the weapon successfully hit a target. The launch was detected the previous day by Japan and South Korea.
Kim Jong Un said he was committed to modernizing the North’s army, and the country had previously claimed to have tested a hypersonic missile last September.
Unlike ballistic missiles that fly into outer space before returning to steep orbits, hypersonic weapons fly to targets at lower altitudes and can move at speeds of more than five times the speed of sound – or about 6,200 kilometers per hour (3,850 miles per hour). hour).
In 2021, it also tested what he said was a new type of submarine-launched ballistic missile (SLBM), a long-range cruise missile and a weapon launched from a train.
North Korea insists that negotiations can only resume when the US and other countries put an end to what they see as “hostile” policies.
But the army’s progress came as the economy came under increasing pressure, not only from sanctions, but strict border closures as a result of the COVID-19 pandemic.