This article explores the historical context of polygamy in Japan, the current legal framework for polygamy in Japan, social attitudes towards polygamy in Japan, the impact of polygamy on Japanese families and society, the role of religion in regulating polygamy in Japan, and global perspectives on polygamy in Japan. Polygamy was widely practiced until 1873 when it was abolished by Emperor Meiji as part of his efforts to modernize and westernize Japanese society. It is currently illegal under Japanese law with a penalty of up to three years imprisonment or a fine up to 500,000 yen (approximately 4500 USD). Social attitudes remain largely negative due to its association with wealth and power which can be seen as selfish or immoral. Religion plays an important role when it comes to regulating this type behavior with most major religions frowning upon this type activity due its association with greed. Global perspectives suggest that while there may be some benefits associated with polygamous relationships, overall these types unions tend to lead more harm than good both at an