Japan's space agency suspended a planned launch on Monday of a rocket carrying what would be the country's first spacecraft to land on the moon, with operator Mitsubishi Heavy Industries (MHI) citing high winds.

Although the H2A rocket, Japan's flagship launch vehicle, has a 98% launch success rate, unsuitable wind conditions in the upper atmosphere forced a suspension less than 30 minutes before the planned liftoff.

"High-altitude winds hit our constraint for a launch ... which had been set to ensure no impact from falling debris outside of pre-warned areas," said MHI's launch unit chief Tatsuru Tokunaga.