This article examines the cultural, historical, religious, legal and social implications of cousin dating in Japan. Historically, cousin marriage was not common and was only practiced by certain families during specific periods of time. The major religions practiced in Japan do not explicitly forbid cousin marriage but emphasize family unity and harmony. Cousin marriages are currently not legally recognized in Japan according to the Civil Code of 1898. Despite being largely ignored by modern society, there are still some social stigmas associated with cousin dating which can make it difficult for couples who want to pursue such a relationship publicly or privately. Despite its controversial nature among certain groups, cousin dating does have its supporters among younger generations of Japanese people today who see it as an acceptable way to express love without necessarily having any long-term implications or commitments attached to it at first glance.