Some people feel that sharing a surname is a natural part of being a family. When spouses and their children all have the same surname, their relationship is easy to recognize, and the shared name can create a sense of family unity.
Under Article 750 of Japan’s Civil Code, a husband and wife take either the husband’s or the wife’s surname, as decided when they marry. The person who changes their name must then update records such as government documents, bank accounts, a driver’s license, insurance policies, and contracts.
This can involve a great deal of paperwork. Even so, some people regard it as an ordinary administrative process that comes with marriage rather than as a major change to who they are.
A change of surname does not necessarily feel like a change of identity. Some people see it simply as a change to their legal name and feel that they themselves remain exactly the same.
Depending on the workplace, a person may continue using their former surname professionally after marriage. They might use one name at work and their legal married surname for official procedures. This allows them to preserve professional relationships, recognition, and achievements connected to the name they have used for years. For some people, using two names in different settings feels perfectly natural.
Others feel a much stronger attachment to the surname they have always used. They may see it not merely as a label but as part of their personal history, career, and connection to their family. Even someone who considers a shared family surname natural can understand why changing a long-held name may feel like a significant burden to someone else.
Allowing spouses to choose separate legal surnames could reduce that burden for people who do not want to change their names. It would also raise another question: which surname should their children use? For people who value a shared surname, having one family name for both the couple and their children has meaning of its own.
Some people experience a shared surname as a sign of family unity. Others experience changing their surname as a serious personal burden. Under the current system, a couple shares one legal surname, but the law cannot make everyone feel the same way about that change.