This article joins the debate on the entry of non-European states into International Society by examining the socialization of Japan into the normative framework of European International Society during the Meiji period. Despite recent arguments that the English School has pioneered an interpretivist approach in the study of international politics, their conceptualization of the expansion of International Society has paid scant regard to non-European perspectives. As a consequence, International Society is commonly portrayed as playing a progressive role in mitigating conflict and enhancing world order. The article challenges the lopsided portrayal of how non-European states were socialized into International Society. It illustrates that Japan was socialized into a Janus-faced International Society. Finally, it argues that the English School's normative commitment to international order and exclusion of non-European perspectives is in danger of undermining its interpretivist credentials.