Japanese names in modern times consist of a family name (surname) followed by a given name. Nevertheless, when a Japanese name is written in the Roman alphabet, ever since the Meiji era, the official policy has been to reverse the order. , the government has stated its intention to change this policy. Japanese names are usually written in kanji. The pronunciation of Japanese kanji in names follows a special set of rules, though parents are able to choose pronunciations; many foreigners find it difficult to read kanji names because of parents being able to choose which pronunciations they want for certain kanji, though most pronunciations chosen are common when used in names. Some kanji are banned for use in names, such as the kanji for "weak" and "failure", amongst others.
Parents also have the option of using hiragana or katakana when giving a name to their newborn child. Names written in hiragana or katakana are phonetic renderings, and so lack the visual meaning of names expressed in the logographic kanji.
According to estimates, there are over 300,000 different surnames in use today in Japan. The three most common family names in Japan are Satō, Suzuki, and Takahashi. People in Japan began using surnames during the Muromachi period. Japanese peasants had surnames in the Edo period; however, they could not use them in public.
While family names follow relatively consistent rules, given names are much more diverse in pronunciation and characters. While many common names can easily be spelled or pronounced, many parents choose names with unusual characters or pronunciations, and such names cannot in general be spelled or pronounced unless both the spelling and pronunciation are given. Unusual pronunciations have especially become common, with this trend having increased significantly since the 1990s. For example, the popular masculine name 大翔 is traditionally pronounced "Hiroto", but in recent years alternative pronunciations "Haruto", "Yamato", "Taiga", "Sora", "Taito", "Daito", and "Masato" have all entered use.