Hypersonic missiles can fly at least five times faster than the speed of sound and on a complex trajectory, which makes them difficult to intercept.
The Pentagon plans to have an array of advanced satellites to tackle hypersonic missile threats.
"We... committed today to commence new trilateral cooperation on hypersonics and counter-hypersonics, and electronic warfare capabilities," a joint statement says.
Moscow’s purported use of a hypersonic missile also carries a political message.
The potential resumption of tests of nuclear weapons and long-range ballistic missiles come as tensions with Washington intensify.
Wednesday's missile launch was the second such test as Pyongyang pursues new military capabilities amid stalled denuclearisation talks
Caught between a pacifist constitution and a rapidly ageing demographic, Japan’s efforts to build military deterrence against China don’t bode well for its future.
Moscow deploys its first regiment of Avangard, capable of carrying nukes at 27 times the speed of sound, a decision that President Vladimir Putin has boasted puts his country in a class of its own.
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