This article discusses the cultural and legal implications of changing one's last name when getting married in Japan. While it was customary for women to change their last names to their husband's after marriage, there has been a shift towards more gender equality, and many women are choosing to keep their maiden names. Legally, there is no requirement to change one's last name, but if one chooses to do so, paperwork must be filed with the local government office. There are benefits and drawbacks to changing one's name, and alternative options such as hyphenated or combined last names exist. The article also addresses international and same-sex couples' considerations. Ultimately, the decision depends on individual values and circumstances.