North Korea is feared to have launched several missiles towards Japan on Wednesday morning.
The launch, from the eastern area of Wonsan, may have failed, Kyodo News reported.
It is not known what type of missiles were involved.
Chief Cabinet Secretary Yoshihide Suga said that the government hasn’t confirmed the launch and that it was always gathering and analyzing information on the country.
South Korea believes a the missile launch did not go off normally, the South Korean defence ministry said, adding it was conducting analysis for further details.
Earlier this month, North Korea fired four ballistic missiles into the sea off Japan’s northwest coast, angering South Korea and Japan.That launch came days after Kim Jong-un promised retaliation over US-South Korea military drills it sees as preparation for war.