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
Double-barrelled name at the end, regardless of whether that name has been passed down by the father or mother, or adopted through marriage. Unlike in the Russian or Hispanic systems, this surname-style middle name is not considered a proper last name in official documents, unless hyphenated into one compound name. In Poland a double surname () is generally joined with a hyphen and by law includes only one hyphen. Polish surnames ("nazwisko" (N. sg.)), like those in most of Europe, are hereditary and generally patrilineal, i.e., passed from the father on to his children. A married woman usually adopts her husband's name.