Business ethics are critical in addressing the growing economic inequality and mounting environmental challenges in our civilization. Ethical leadership plays a crucial role in promoting business ethics for a better tomorrow. Considering the cultural differences between the East and the West, this paper adopted an emic approach to examining the antecedent process of Confucian ethical leadership. A case study of Kazuo Inamori, a Japanese Confucian merchant, revealed the formation process of Confucian ethical leadership. Even in adversity, Inamori demonstrated strong moral volition to be benevolent, diligent, and temperate. These ethical behaviors often led to positive outcomes in interpersonal relationships, job performance, and self-cultivation, thereby fulfilling basic psychological needs and further enhancing ethical motivation. Additionally, the research revealed that his initial ethical motivation originated from his reflection which resulted in a firm belief in “Heaven.” Accordingly, the “Confucian Heaven-dynamic model” was constructed to illustrate the antecedent process of Confucian ethical leadership.