On Reuters:-
North Korea fired a projectile that appeared to be a missile shortly before midnight Japan time (1500 GMT) on Friday, Japan's public broadcaster NHK said, citing government officials.
The apparent missile may have landed in Japan's exclusive economic zone, NHK said.
And on the Guardian website
Japan’s prime minister has said North Korea fired what is believed to be a missile that may have landed in the sea off Japan.
Prime Minister Shinzo Abe told reporters that officials were analysing the apparent launch, just before midnight on Friday, and that he had called a meeting of the National Security Council. He said Japan would take every necessary step to ensure the safety of its citizens.
In Washington, a Pentagon spokesman, Navy Capt Jeff Davis, confirmed that a launch of a ballistic missile from North Korea had been detected.
He said: “We are assessing and will have more information soon.”