Japan and the US to create a plant to assemble AMRAAM missiles The US and Japan have reached an agreement to establish a facility in Japan for large-scale assembly and testing of AMRAAM air-to-air missiles. The parties also agreed to exchange technical information to increase production of SM-3 Block IIA missiles. According to the Japanese Ministry of Defense S. Koizumi, the two agreements are part of the Joint Warrant Operation initiative to expand cooperation in the field of military technologies.