This article explores the history, legality, cultural attitudes towards, and financial implications of having multiple wives in Japan. It explains that while polygamy has been practiced in Japan for centuries, it is currently illegal according to Japanese law. Additionally, those engaging in such relationships face potential social stigma from their peers as well as legal repercussions if they fail to disclose their arrangement beforehand or seek proper legal advice first. Furthermore, there are additional costs associated with maintaining such an arrangement including providing adequate care for all parties involved.