North Korea fired off a barrage of six missiles Thursday, including one that South Korea said may have been an intercontinental ballistic missile that failed in-flight.

Japan also confirmed the launches, including the apparent ICBM firing, with Prime Minister Fumio Kishida slamming the North's first such launch since late May.

"The continued firing of these weapons, day after day, is an outrage and cannot be tolerated," Kishida said.