The article examines the case of Japan’s peacebuilding in South Sudan from 2011 to 2017 and asks how Japan’s shift towards a more proactive defence posture affects the place of human security in its foreign policy agenda. Using the framework of neoclassical realism, the article argues that human security remains a critical element of Japanese foreign policy despite changes in its strategic orientation because, international predicaments notwithstanding, Japan’s foreign policy decision making is still significantly…