The United States and Japan -- two global technology innovation powerhouses -- are teaming up to collaborate on high-power microwaves, autonomous systems and counter-hypersonic weapons, inking new agreements to expand military research and development while advancing plans for potential collaboration on a new Aegis guided-missile interceptor. On Jan. 11, Defense Secretary Lloyd Austin and Japan’s Defense Minister Hamada Yasukazu signed a bilateral Research, Development, Test and Evaluation Memorandum of Understanding and a Security of Supply Agreement; the former is legally...