Although family sociology in Japan has a long history, sociological family studies in Japan have undergone major changes since the 1990s. This article recounts the ways in which family sociology in Japan has developed and its current state, with a special focus on the developments in the last three decades. The 1990s marked a turning point in the history of Japanese family sociology in terms of the establishment of new academic societies and a paradigmatic shift in theoretical orientations. The trends in family research articles indicate the continuing importance of quantitative research, with the role of qualitative research on the rise over the last two decades. In reviewing the literature over the last three decades, the author summarizes four major strands of empirical research: (a) care and families, (b) social inequality and families, (c) comparative research, and (d) diversity of families.