Taking the political ideology of early modern East Asia as the object of study，the book Confucianism and after：Political Thoughts in Early Modern East Asia inherits the “conceptual history” research method of its previous work The Modern Japanese Society and the Sung Study，deepens the view that zhuism is not an ideology of the Tokugawa shogunate，and completes the repositioning of zhuism in early modern Japan on the basis of the research of the previous research，which is a unique and effective attempt to break through the preconception of Maruyama in the field of history of ideology.