The system of divorce, which is a very important part of the marriage system, also formed a complete system and developed to its peak in the feudal era of the Tang Dynasty. In the process of economic, cultural and political exchanges between the Tang Dynasty and other countries, the divorce system of the late Asuka Period, the Nara Period and the early Heian Period in Japan, which corresponded to the Tang Dynasty, had a certain influence. This paper mainly combines the historical material "Tang Laws and Regulations" and Japanese "Pension Laws", "Household Marriage Laws" and other laws to carry out theoretical research, literature research method, and comparative research method. In the process of transplantation of Chinese law, it also reflects the different social ideologies of two different countries for the divorce system, and it produces a certain difference for the maintenance of harmonious family relations, social stability, and the sense of well-being of the divorce system to different.
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