It's the North's 13th ballistic missile fired this year alone.
This might have been Kim's plan all along as he sought what to do next after North Korea's weapons development reached a point where it could test intercontinental ballistic missiles meant to reach deep into the US mainland.
South Korean analysts said North Korea's threat against Guam and the launch over Japan on Tuesday are likely attempts to make launches over Japan an accepted norm and win itself greater military space in a region dominated by enemies.
China condemned "destructive" calls for new sanctions on North Korea Thursday, warning Japan, the USA and Britain that diplomacy was needed to avert crisis days after nuclear-armed Pyongyang fired a missile over Japan.
Wang reiterated China's position of placing importance on dialogue with North Korea, the ministry said.
The planned joint US and South Korean response has been named OPLAN 5015.
The Pentagon chief declined to confirm reports that North Korea could be preparing a new nuclear test, which would be widely seen as another provocative and unsafe move by the Pyongyang regime.
The U.S. and South Korean militaries say the Hwasong-12 fired over Japan's northern island of Hokkaido flew about 2,700 kilometers (1,677 miles).
Pyongyang has warned of more similar tests to come.
China, North Korea's only major ally, has been calling for a "dual suspension" in which the North stops its nuclear and missile tests and Washington and Seoul halt their military exercises to lower tensions and lead to talks.
Asked why there was no defensive military action taken over the launch, Mattis suggested that United States and Japanese forces nearly immediately knew the missile, which landed far out into the Pacific Ocean, was not targeted at anyone.
"I agree with the president..."
North Korea won't stop its military provocations toward its neighbors and the US's allies, but with the horrifying possibility that F-35s are lurking overhead, don't expect North Korea to kill anything more than fish with its missile forces.
She said London and Tokyo would work together to pressure North Korea "including by increasing the pace of sanctions" against Pyongyang after its "outrageous" firing of a missile. He says the North Korean threat toward Guam is more about winning greater freedom of military action than about deterring flyovers of US bombers or stopping the U.S.