Meiji Surname Adoption
明治の苗字 (めいじのみょうじ)
The historical process during the Meiji era (1868–1912) when all Japanese citizens were required by law to adopt a family name, creating the modern Japanese surname system.
The Meiji surname adoption refers to one of the most significant transformations in Japanese naming history. Prior to the Meiji Restoration of 1868, the use of surnames was largely restricted to the samurai, aristocratic, and priestly classes. The vast majority of Japanese commoners — estimated at over 90% of the population — officially had no family name. The Meiji government first permitted all citizens to take surnames in 1870 and then made it compulsory in 1875.
How Names Were Chosen
When millions of Japanese families suddenly needed to choose a surname, they drew on a variety of sources. The most common approach was to adopt a name based on geography — the landscape, topography, or location of one's home. This is why Japanese surnames are so rich in natural imagery: Yamada (山田, mountain field), Kawaguchi (川口, river mouth), Matsumoto (松本, pine base), and Inoue (井上, above the well) all reflect physical environments. Others chose names associated with their occupation, their village, or a local shrine.
Impact on Modern Japan
This compressed period of surname creation explains several distinctive features of the Japanese surname landscape: the enormous total number of unique surnames (estimates range from 100,000 to over 300,000), the strong geographic clustering of certain names in specific regions, and the prevalence of nature-related elements like mountain (山), river (川), field (田), forest (森), and stone (石). The Meiji surname adoption is essentially the origin story of modern Japanese family names.