Research on principals' practice of democratic leadership for inclusion in schools has been undertaken in many parts of the world. This paper explores four principals' leadership journeys in response to social justice issues in increasingly diverse settings within public schools, in relation to demographic and cultural changes in Hong Kong. This research aims at exploring the issues in schools arising from contextual changes in the society, contextualising characteristics of principals' practices in relation to an emergent conception of democratic leadership practice in addressing the issues and identifying practical roles of democratic principal leadership in school transformation for diverse students' learning development. I adopted a cross-case study of the principals' leadership journeys through a theoretical lens of democratic leadership. The changes of demographic structure and cultural context and pressure from the central administration were the conditions of facilitating alternative practices of democratic principal leadership in a multicultural school context which evolved from the hybrid of Western and Confucian cultures in the city. These findings contribute to an international account of contextualising democratic leadership practices in a diverse Chinese school community.