This article explores the history and current legal status of polygamy in Japan, as well as its social acceptance and religious views. Polygamy has been practiced since ancient times, but is now illegal and considered a criminal offense punishable by law. It is not socially accepted and those who practice it often face discrimination from their peers or ostracization from their family. There are still some cases where people practice it without being punished due to loopholes in the law or lack of enforcement, but overall it remains a difficult lifestyle choice for most.