The aim of this special issue is to give a new spin to the study of the impact of the liberal Wilsonian moment on Japan, with a focus on the interwar period in a broader historical span. The Wilsonian liberal international order encompasses its fledgling (1914–1945), formative (1945–1952), competitive (1952–1989), and maturity (1989–2018) periods. In this special issue, the four articles deal with the first and second periods. Yutaka Harada and Frederick Dickinson adopt this longer perspective – not just President Wilson's moment of Fourteen Points – each focusing on (1) the vigor of Japan's industrialization and open economic policy in 1914–1931 and (2) the basic continuity between the prewar and postwar periods in terms of normative and institutional commitments with the fledgling, if volatile, liberal international order such as those with the Versailles and Washington treaties after World War I, the war prohibition treaty of 1928, and the naval disarmament treaty of 1930. Ryoko Nakano and Takashi Inoguchi take up the re-examination of two tiny minorities of liberal academics, Yanaihara Tadao and Nambara Shigeru, who at most kept their integrity. Nakano recasts Yanaihara's academic life with its intellectual agony of believing in a national self-determination policy for Japanese colonies. Inoguchi underlines Nambara's stoic self-discipline under wartime dictatorship and active political involvement under US occupation regarding the newly drafted Japanese Constitution. An emphasis is placed on the considerable positive influence of Wilsonian ideas on Japan, an influence that faded in the late 1930s, but re-emerged with considerable vigor after 1945.