During the late 1930s and early 1940s Japanese researchers carried out a large and well-funded study of customary law in rural North China. The results of that research, published in the 1950s, have been one of the major sources for theories about prewar Chinese rural society. In the last twenty years Japanese and Chinese researchers have undertaken follow-up studies of the same villages. This review article introduces Chinese and Japanese follow-up studies on the kankō chōsa villages, the new materials and approaches they have used, and their contributions to on-going debates about Chinese rural society and social change.