Civil society organizations have warned that if “lethal autonomous weapons systems” (LAWS) are created, such weapons would cause serious problems with regards to human rights. Although “fully autonomous” weapons do not exist at this stage, several countries are thought to have developed “semi-autonomous” weapons equipped with artificial intelligence. LAWS related issues have been a part of international discussions in the United Nations, and the Japanese government has actively participated in these conferences. Japanese politicians have also discussed issues related to LAWS in the National Diet since 2015. This article provides multiple paradigms of Japan’s policy toward LAWS from the perspectives of international relations theory, and attempts to explore possible solutions to the international regulation of LAWS in international law.