This article explores the legal status, social acceptance, pros and cons, potential solutions, and cultural factors influencing the acceptance of polygamy in Japan. It was once widely accepted during the Edo period but after 1868 it became illegal and punishable by up to three years imprisonment or a fine. Despite being illegal, some communities still practice it due to economic necessity or traditional values. Potential solutions include education, legal reforms, support services, and social welfare programs. Cultural factors such as religion and gender roles also influence attitudes towards polygamy in Japan.