Women in Japan period to 100 days and allows any woman who is not pregnant during the divorce to remarry immediately after divorce. The Civil Code of Japan requires legally married spouses to have the same surname. Although the law is gender-neutral, meaning that either spouse is allowed to change his/her name to that of the other spouse, Japanese women have traditionally adopt their husband’s family name and 96% of women continue to do so as of 2015. In 2015, the Japanese Supreme Court upheld the constitutionality of the law, noting that women could use their maiden names informally, and stating that it
Maiden and married names There is a widespread, though not universal, custom for a newly married wife to adopt the husband's family name. However, as Russia is not a common law country, any name change requires a formal procedure including an official application to the civil acts registrar. As the same registrar also records marriages, for the convenience sake it is often done during the marriage proceedings, as governed by the Federal Law #143-FZ "On Civil State Acts", and the couple's marriage certificate has an option of having one common family name, or both spouses going by their original surname. However, the law is