The RS-28 Sarmat weighs around 220 tons and can carry a nuclear warhead large enough to destroy Texas.
Russia doubts claims that the U.S. will not play a role in operating and controlling the system in Japan.
Moscow alleges that the missile defense systems violate the 1987 Intermediate-Range Nuclear Forces Treaty.
A new report showed Yemen's Iran-friendly Houthi movement evaded the U.S. anti-missile system protecting troops from North Korea.
Japan is eyeing the deployment of the Aegis Ashore, a land-base missile defense system.